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      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
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      <PublicSupportPY170Pct>0.90920</PublicSupportPY170Pct>
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      <Form990ScheduleAPartVIGrp>
        <FormAndLineReferenceDesc>SCHEDULE A, PART VI, LIST OF UNUSUAL GRANTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: BEQUEST DATE: 08/21/19 AMOUNT: 166667. DESCRIPTION: BEQUEST DATE: 11/23/20 AMOUNT: 161560. DESCRIPTION: BEQUEST DATE: 05/11/22 AMOUNT: 41667.</ExplanationTxt>
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        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
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        <ContributorUSAddress>
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          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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      <CollUsedScholarlyRsrchInd>X</CollUsedScholarlyRsrchInd>
      <CollectionUsedPreservationInd>X</CollectionUsedPreservationInd>
      <SolicitedAssetsSaleInd>0</SolicitedAssetsSaleInd>
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        <BookValueAmt>26634</BookValueAmt>
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      <BuildingsGrp>
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      <EquipmentGrp>
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        <DepreciationAmt>192811</DepreciationAmt>
        <BookValueAmt>1664</BookValueAmt>
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      <OtherLandBuildingsGrp>
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        <DepreciationAmt>282</DepreciationAmt>
        <BookValueAmt>370</BookValueAmt>
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      <TotalBookValueLandBuildingsAmt>1433571</TotalBookValueLandBuildingsAmt>
      <FootnoteTextInd>X</FootnoteTextInd>
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      <RevenueNotReportedFinclStmtAmt>7275</RevenueNotReportedFinclStmtAmt>
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      <OtherExpensesIncludedAmt>2423</OtherExpensesIncludedAmt>
      <ExpensesNotReportedAmt>2423</ExpensesNotReportedAmt>
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        <FormAndLineReferenceDesc>PART III, LINE 1A:</FormAndLineReferenceDesc>
        <ExplanationTxt>IN ACCORDANCE WITH ASU 2019-03, THE SOCIETY DOES NOT CAPITALIZE DONATED WORKS OF ART OR RECOGNIZE THEM AS REVENUES OR GAINS ON THE STATEMENT OF ACTIVITIES. THAT STATEMENT PROVIDES THAT SUCH DONATIONS NEED NOT BE RECOGNIZED IF THEY ARE ADDED TO COLLECTIONS THAT ARE HELD FOR PUBLIC EXHIBITION, EDUCATION OR RESEARCH IN FURTHERANCE OF PUBLIC SERVICE RATHER THAN FINANCIAL GAIN; ARE PROTECTED, KEPT UNEMCUMBERED, CARED FOR, AND PRESERVED; AND ARE SUBJECT TO A POLICY THAT REQUIRES THE PROCEEDS FROM SALES OF COLLECTION ITEMS TO BE USED TO ACQUIRE OTHER ITEMS FOR COLLECTIONS. IN ADDITION, ITEMS ACQUIRED THROUGH PURCHASE ARE NOT CAPITALIZED. PURCHASES OF COLLECTION ITEMS ARE RECORDED AS DECREASES IN NET ASSETS WITHOUT DONOR RESTRICTION IF PURCHASED WITH SUCH ASSETS AND AS DECREASES IN NET ASSETS WITH DONOR RESTRICTION IF PURCHASED WITH DONOR RESTRICTED ASSETS. PROCEEDS FROM THE SALE OF COLLECTION ITEMS ARE PRESENTED AS AN INCREASE IN NET ASSETS. THE SOCIETY'S COLLECTION'S MANAGEMENT POLICY ESTABLISHES FOUR BROAD CATEGORIES OF COLLECTIONS, GENERAL HISTORY, DECORATIVE ARTS, FINE AND FOLK ARTS, AND ETHNOGRAPHIC AND NATURAL HISTORY, WHICH GUIDE THE SOCIETY'S COLLECTING PRACTICES. WITHIN THESE CATAGORIES THERE ARE SMALLER GROUPINGS OF DIVERSE HISTORICAL OBJECTS THAT INCLUDE ITEMS SUCH AS ARMS AND ARMAMENT, COSTUMES, TOOLS AND EQUIPMENT, CERAMICS, FURNITURE, GLASS, TEXTILES, PAINTINGS, DRAWINGS, SCULPTURE, GRAPHIC ARTS, MUSICAL INSTRUMENTS,PROJECTILE POINTS AND STONE TOOLS,NATIVE AMERICAN HANDIWORK AND WILDLIFE SPECIMENS. THE GENERAL HISTORY (COSTUME, TOOLS AND EQUIPMENT,DOLLS, TOYS AND GAMES)AND THE DECORATIVE ARTS (CERAMICS, FURNITURE AND TEXTILES) ARE CONSIDERED THE "PRIMARY COLLECTIONS" OF THE SOCIETY. THE LIBRARY AND ARCHIVAL COLLECTIONS ARE DIVIDED INTO TWO BROAD CATEGORIES, EACH WITH SUB-GROUPINGS. THE LIBRARY COLLECTIONS INCLUDE MATERIALS FOR GENERAL HISTORICAL RESEARCH, GENEALOGICAL RESEARCH AND CULTURAL RESOURCE PUBLICATIONS. THE ARCHIVE INCLUDES PERSONAL PAPERS, ACCOUNT BOOKS, DIARIES, MARITIME DOCUMENTS, PHOTOGRAPHS, MAPS AND RAILROAD MATERIALS. THE PHOTOGRAPH COLLECTIONS, AND MANUSCRIPT COLLECTIONS (ORIGINAL DOCUMENTS) ARE IRREPLACEABLE, AND THEREFORE ARE CONSIDERED TO BE OF GREATER IMPORTANCE RELATIVE TO OTHER COLLECTIONS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART X, LINE 2:</FormAndLineReferenceDesc>
        <ExplanationTxt>ACCOUNTING STANDARDS REQUIRE THAT MANAGEMENT EVALUATE THE ACCOUNTING FOR UNCERTAINTY IN TAX POSITIONS. COMPANIES ARE REQUIRED TO RECOGNIZE IN THEIR FINANCIAL STATEMENTS THE IMPACT OF A TAX POSITION IF THE POSITION IS MORE LIKELY THAN NOT OF BEING SUSTAINED ON AUDIT. THE POSITON ASCERTAINED INHERENTLY REQUIRES JUDGMENT AND ESTIMATES BY MANAGEMENT. FOR THE YEARS ENDED DECEMBER 31, 2023 AND 2022 THE SOCIETY DOES NOT BELIEVE THAT THEY HAVE ANY MATERIAL UNCERTAIN TAX POSITIONS THAT WOULD REQUIRE THEM TO MEASURE AND REFLECT THE POTENTIAL LACK OF SUSTAINABILITY OF A POSITION ON AUDIT IN THEIR FINANCIAL STATEMENTS. MANGEMENT WILL CONTINUE TO EVALUATE THEIR TAX POSITIONS TO DETERMINE IF MEASUREMENT AND RECOGNITION IN THE PRESENTATION OF FINANCIAL STATEMENTS IS REQUIRED. THE SOCIETY BELIEVES IT IS NO LONGER SUBJECT TO EXAMINATION PRIOR TO 2020.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XI, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF MERCHANDISE SOLD</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART XII, LINE 2D - OTHER ADJUSTMENTS:</FormAndLineReferenceDesc>
        <ExplanationTxt>COST OF MERCHANDISE SOLD</ExplanationTxt>
      </SupplementalInformationDetail>
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        <Desc>BOOKS FOR SALE</Desc>
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        <NoncashContributionsRptF990Amt>241</NoncashContributionsRptF990Amt>
        <MethodOfDeterminingRevenuesTxt>FMV</MethodOfDeterminingRevenuesTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>PART I, LINE 33:</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY DOES NOT CAPITALIZE ITS COLLECTION ITEMS. NO VALUE IS ASSIGNED.</ExplanationTxt>
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    </IRS990ScheduleM>
    <IRS990ScheduleO documentId="RetDoc1044400001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 6</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY'S MEMBERSHIP IS MAINLY MADE UP OF INDIVIDUALS WHO RESIDE IN THE COUNTY OF SUFFOLK. THE SOCIETY CHARGES A MEMBERSHIP FEE WHICH ENTITLES THE MEMBER TO FREE USE OF THE SOCIETY'S LIBRARY COLLECTIONS, INCLUDING RESEARCH SERVICES AND PHOTOCOPYING OF RESEARCH MATERIAL AT A REDUCED RATE. MEMBERS ALSO RECIEVE A 10% DISCOUNT IN THE SOCIETY'S MUSEUM GIFT SHOP.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL OFFICERS AND DIRECTORS MUST BE MEMBERS OF THE SOCIETY AND SHALL BE ELECTED BY A PLURALITY OF VOTES CAST BY BALLOT AT THE ANNUAL MEETING BY MEMBERS OF THE SOCIETY.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION A, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE CONSTITUTION AND BY-LAWS MAY BE AMENDED AT ANY REGULAR MEETING OF THE SOCIETY BY A TWO THIRD (2/3) VOTE OF THOSE VOTING, PROVIDED A THIRTY (30) DAY NOTICE IN WRITING OF THE PROPOSED CHANGE BE SERVED BY MAIL ON EACH MEMBER. OR IT MAY BE AMENDED AT A SPECIAL MEETING CALLED FOR THAT PURPOSE, WITH THE REQUIRED PREVIOUS NOTICE AND A TWO THIRD (2/3) VOTE. ALL PROPOSED AMENDMENTS SHALL BE SUBMITTED IN WRITING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE FORM 990 IS PREPARED BY THE AUDITORS,BASED ON THE AUDITED FINANCIAL STATEMENT, AND IS REVIEWED BY THE DIRECTOR, TREASURER AND THE AUDIT COMMITTEE BEFORE RELEASED BY THE DIRECTOR.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>ANNUAL REVIEW OF WRITTEN POLICY, WITH ACKNOWLEDGEMENT SIGNATURES, BY ALL TRUSTEES AND OFFICERS. SIGNATURES ARE AFFIXED DURING A REGULAR TRUSTEES MEETING AT WHICH OPPORTUNITY TO DISCUSS OR ASK QUESTIONS IS AFFORDED TO ALL INVOLVED, AND THE SIGNATURE SHEET IS INCLUDED IN THE MINUTES OF THE MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION B, LINE 15</FormAndLineReferenceDesc>
        <ExplanationTxt>PER WRITTEN POLICY, THE BOARD (ALL BOARD MEMBERS ARE INDEPENDENT AND FREE OF RELATED CONFLICTS OF INTEREST) CONDUCTS AN ANNUAL PERFORMANCE AND COMPENSATION REVIEW OF THE EXECUTIVE DIRECTOR, INCLUDING CONSIDERATION OF COMPARATIVE COMPENSATION DATA, AND DETERMINES COMPENSATION AND CONTRACT ADJUSTMENTS. THE REVIEW IS REPORTED IN THE BOARD MINUTES. NO OFFICERS RECEIVE COMPENSATION. THERE ARE NO "OTHER KEY EMPLOYEES" AS DEFINED IN THE INSTRUCTIONS FOR PART VII SECTION A.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART VI, SECTION C, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>THE ORGANIZATION'S GOVERNING DOCUMENTS AND FINANCIAL STATEMENTS ARE AVAILABLE UPON REQUEST. NO SUCH REQUESTS WERE RECEIVED DURING 2023.</ExplanationTxt>
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</Return>