UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934
                              (Amendment No. ___)*

                            Mercer International Inc.
                                (Name of Issuer)

              Common Shares of Beneficial Interest, $0.01 par value
                         (Title of Class of Securities)

                                    588056101
                                 (CUSIP Number)

                                December 31, 2005
             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

      |_|   Rule 13d-1(b)

      |X|   Rule 13d-1(c)

      |_|   Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).



CUSIP No. 588056101                    13G
--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Peter R. Kellogg
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [_]
                                                                         (b) [_]

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      United States
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     6,038,232
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        NONE
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            6,038,232
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     NONE
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      6,038,232
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*  [_]


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      17.3%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON*

      IN, HC
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


CUSIP No. 588056101                    13G
--------------------------------------------------------------------------------
1.    NAME OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      IAT Reinsurance Company Ltd.
--------------------------------------------------------------------------------
2.    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*                  (a) [_]
                                                                         (b) [_]

--------------------------------------------------------------------------------
3.    SEC USE ONLY


--------------------------------------------------------------------------------
4.    CITIZENSHIP OR PLACE OF ORGANIZATION

      Bermuda
--------------------------------------------------------------------------------
               5.    SOLE VOTING POWER

                     5,901,332
               -----------------------------------------------------------------
  NUMBER OF    6.    SHARED VOTING POWER
   SHARES
 BENEFICIALLY        NONE
  OWNED BY     -----------------------------------------------------------------
    EACH       7.    SOLE DISPOSITIVE POWER
  REPORTING
   PERSON            5,901,332
    WITH       -----------------------------------------------------------------
               8.    SHARED DISPOSITIVE POWER

                     NONE
--------------------------------------------------------------------------------
9.    AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

      5,901,332
--------------------------------------------------------------------------------
10.   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*  [_]


--------------------------------------------------------------------------------
11.   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

      17.0%
--------------------------------------------------------------------------------
12.   TYPE OF REPORTING PERSON*

      CO
--------------------------------------------------------------------------------
                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


CUSIP No. 588056101


ITEM 1(a). NAME OF ISSUER:

            Mercer International Inc. ("Mercer")

ITEM 1(b). ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

            14900 Interurban Avenue South
            Suite 282
            Seattle, WA 98168

ITEM 2(a). NAME OF PERSON FILING:

            This statement is filed on behalf of Peter R. Kellogg and IAT
Reinsurance Company Ltd. ("IAT"), a Bermuda corporation. Mr. Kellogg is the sole
owner of IAT's voting stock, is a member of IAT's board of directors, and is the
President and CEO of IAT.

            Mr. Kellogg and IAT previously reported their ownership of Mercer on
a Schedule 13D filed on August 31, 2004. Pursuant to Rule 13d-1(h), Mr. Kellogg
and IAT are no longer required to report their ownership on a Schedule 13D
because they no longer beneficially own more than 20% of the outstanding shares
of Mercer. A joint filing agreement of Mr. Kellogg and IAT is attached as
Exhibit A to the previously filed 13D.

            This statement relates to 4,256,171 Shares of Mercer held by IAT and
its wholly-owned subsidiaries, 136,900 Shares of Mercer held by two partnerships
and a foundation which are controlled by Mr. Kellogg, and 1,645,161 issuable
upon conversion of $12,750,000 of 8.5% convertible senior subordinated notes
held by IAT and its subsidiaries. The convertible notes are convertible into
Shares at any time prior to the maturity date of October 15, 2010 at a
conversion price of $7.75 per share, subject to certain adjustments.

            Mr. Kellogg has sole dispositive and voting power with respect to
the shares of Mercer owned by IAT and its subsidiaries. Mr. Kellogg disclaims
beneficial ownership of the shares owned by the foundation and by IAT and its
subsidiaries, and this statement should not be deemed to be an admission that
Mr. Kellogg is a member of any "group" within the meaning of Section 13(d)(3) of
the Securities Exchange Act of 1934, as amended, and the rules and regulations
thereunder.

ITEM 2(b). ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

            120 Broadway, New York, NY 10271

ITEM 2(c). CITIZENSHIP:

            IAT is a Bermuda corporation, and Peter R. Kellogg is a citizen of
            the United States.



CUSIP No. 588056101


ITEM 2(d). TITLE OF CLASS OF SECURITIES:

            Common Shares, $0.01 par value

ITEM 2(e). CUSIP NUMBER:

            588056101

ITEM 3. IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b) OR
        13d-2(c), CHECK WHETHER THE PERSON FILING IS A:

            N/A

ITEM 4. OWNERSHIP

      (a)   AMOUNT BENEFICIALLY OWNED: 6,038,232 shares

      (b)   PERCENT OF CLASS: 17.3%

      (c)   NUMBER OF SHARES AS TO WHICH SUCH PERSON HAS:

            (i)   Sole power to vote or to direct the vote: 6,038,232 shares

            (ii)  Shared power to vote or to direct the vote: NONE

            (iii) Sole power to dispose or to direct the disposition of:
                  6,038,232 shares

            (iv)  Shared power to dispose or to direct the disposition of: NONE

ITEM 5. OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

            If this statement is being filed to report the fact that as of the
            date hereof the reporting person has ceased to be the beneficial
            owner of more than 5 percent of the class of securities, check the
            following: |_|

ITEM 6. OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON

            The non-voting stockholders of IAT and the beneficiaries of the
            foundation have the right to participate in the receipt of dividends
            from, or proceeds from the sale of, the shares held by them in
            accordance with their respective ownership interests in IAT and the
            foundation.

ITEM 7. IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE
        SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY

            See Exhibit B.



CUSIP No. 588056101


ITEM 8. IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP

            Not Applicable

ITEM 9. NOTICE OF DISSOLUTION OF GROUP

            Not Applicable

ITEM 10. CERTIFICATION

            By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were not acquired and are not held for
the purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.



CUSIP No. 588056101


                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

                                  IAT REINSURANCE COMPANY LTD.

Dated: February 14, 2006
       York, New York             By: /s/ Marguerite R. Gorman, attorney in fact
                                      ------------------------------------------
                                      Name:  Peter R. Kellogg
                                      Title:  Chairman of the Board

Dated: February 14, 2006
       New York, New York             /s/ Marguerite R. Gorman, attorney in fact
                                      ------------------------------------------
                                      Peter R. Kellogg



CUSIP No. 588056101


                                                                       Exhibit A

                                POWER OF ATTORNEY

            KNOW ALL BY THESE PRESENTS, that the undersigned hereby constitutes
and appoints Marguerite R. Gorman as the undersigned's true and lawful
attorney-in-fact to:

      (1)   Execute for and on behalf of the undersigned, in the undersigned's
            individual capacity and in the undersigned's capacity as an officer
            and/or director of IAT Reinsurance Co. Ltd., a Bermuda corporation
            ("IAT"), all Forms 3, 4, and 5 in accordance with Section 16(a) of
            the Securities Exchange Act of 1934, and all Schedules 13D and 13G
            in accordance with Section 13 of the Securities Exchange Act of
            1934, and the rules thereunder, and any other forms or reports the
            undersigned may be required to file in connection with the
            undersigned's or IAT's ownership, acquisition, or disposition of any
            equity securities which are registered under Section 12 of the
            Securities Exchange Act of 1934;

      (2)   do and perform any and all acts for and on behalf of the undersigned
            or IAT which may be necessary or desirable to complete and execute
            any such Form 3, 4, or 5, or any such Schedule 13D or 13G, or other
            form, schedule or report, and timely file such form, schedule or
            report with the United States Securities and Exchange Commission and
            any stock exchange or similar authority; and

      (3)   take any other action of any type whatsoever in connection with the
            foregoing which, in the opinion of such attorney-in-fact, may be of
            benefit to, in the best interest of, or legally required by, the
            undersigned or IAT, it being understood that the documents executed
            by such attorney-in-fact on behalf of the undersigned or IAT
            pursuant to this Power of Attorney shall be in such form and shall
            contain such terms and conditions as such attorney-in-fact may
            approve in such attorney-in-fact's discretion.

            The undersigned hereby grants to the attorney-in-fact full power and
authority to do and perform any and every act and thing whatsoever requisite,
necessary, or proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as the undersigned might or
could do if personally present, with full power of substitution or revocation,
hereby ratifying and confirming all that such attorney-in-fact, or such
attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be
done by virtue of this power of attorney and the rights and powers herein
granted. The undersigned acknowledges that the forgoing attorney-in-fact, in
serving in such capacity at the request of the undersigned, is not assuming any
of the undersigned's responsibilities to comply with Section 13 or Section 16 of
the Securities Exchange Act of 1934.

            This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4, and 5 and/or Schedules
13D or 13G with respect to the undersigned's and/or IAT's holdings of and
transactions in equity securities registered under Section 12 of the Securities
Exchange Act of 1934, unless earlier revoked by the undersigned in a signed
writing delivered to the foregoing attorneys-in-fact.

            IN WITNESS WHEREOF, the undersigned has caused this Power of
Attorney to be executed as of this 1st day of August, 2005.


                                                       /s/  Peter R. Kellogg
                                                       -------------------------
                                                       Peter R. Kellogg



                                                                       Exhibit B

                                     ITEM 7

            IAT is the relevant subsidiary for which Peter R. Kellogg may be
considered a control person.