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      <OrganizationFollowsSFAS117Ind>X</OrganizationFollowsSFAS117Ind>
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        <EOYAmt>140168</EOYAmt>
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        <EOYAmt>8594</EOYAmt>
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        <EOYAmt>3449775</EOYAmt>
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      <TotLiabNetAssetsFundBalanceGrp>
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      <ReconcilationRevenueExpnssAmt>18240</ReconcilationRevenueExpnssAmt>
      <NetUnrlzdGainsLossesInvstAmt>30549</NetUnrlzdGainsLossesInvstAmt>
      <MethodOfAccountingAccrualInd>X</MethodOfAccountingAccrualInd>
      <AccountantCompileOrReviewInd>true</AccountantCompileOrReviewInd>
      <AcctCompileOrReviewBasisGrp>
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      <AuditCommitteeInd>true</AuditCommitteeInd>
      <FederalGrantAuditRequiredInd>false</FederalGrantAuditRequiredInd>
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        <CurrentTaxYearMinus2YearsAmt>77931</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>68499</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>89657</CurrentTaxYearAmt>
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      <TotalCalendarYear170Grp>
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        <CurrentTaxYearMinus3YearsAmt>115502</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>77931</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>68499</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>89657</CurrentTaxYearAmt>
        <TotalAmt>439467</TotalAmt>
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      <SubstantialContributorsTotAmt>36098</SubstantialContributorsTotAmt>
      <PublicSupportTotal170Amt>403369</PublicSupportTotal170Amt>
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        <CurrentTaxYearMinus3YearsAmt>55430</CurrentTaxYearMinus3YearsAmt>
        <CurrentTaxYearMinus2YearsAmt>57170</CurrentTaxYearMinus2YearsAmt>
        <CurrentTaxYearMinus1YearAmt>61442</CurrentTaxYearMinus1YearAmt>
        <CurrentTaxYearAmt>61349</CurrentTaxYearAmt>
        <TotalAmt>289870</TotalAmt>
      </GrossInvestmentIncome170Grp>
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      <GrossReceiptsRltdActivitiesAmt>94108</GrossReceiptsRltdActivitiesAmt>
      <PublicSupportCY170Pct>0.55310</PublicSupportCY170Pct>
      <PublicSupportPY170Pct>0.61210</PublicSupportPY170Pct>
      <ThirtyThrPctSuprtTestsCY170Ind>X</ThirtyThrPctSuprtTestsCY170Ind>
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        <ContributorNum>RESTRICTED</ContributorNum>
        <ContributorBusinessName>
          <BusinessNameLine1>RESTRICTED</BusinessNameLine1>
        </ContributorBusinessName>
        <ContributorUSAddress>
          <AddressLine1>RESTRICTED</AddressLine1>
          <AddressLine2>RESTRICTED</AddressLine2>
          <City>RESTRICTED</City>
          <State>RESTRICTED</State>
          <ZIPCode>RESTRICTED</ZIPCode>
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        <EndYearBalanceAmt>8594</EndYearBalanceAmt>
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        <BeginningYearBalanceAmt>8594</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>8594</EndYearBalanceAmt>
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      <CYMinus2YrEndwmtFundGrp>
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        <EndYearBalanceAmt>8594</EndYearBalanceAmt>
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      <CYMinus3YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>8594</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>8594</EndYearBalanceAmt>
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      <CYMinus4YrEndwmtFundGrp>
        <BeginningYearBalanceAmt>8594</BeginningYearBalanceAmt>
        <EndYearBalanceAmt>8594</EndYearBalanceAmt>
      </CYMinus4YrEndwmtFundGrp>
      <EndowmentsHeldUnrelatedOrgInd>false</EndowmentsHeldUnrelatedOrgInd>
      <EndowmentsHeldRelatedOrgInd>false</EndowmentsHeldRelatedOrgInd>
      <LandGrp>
        <OtherCostOrOtherBasisAmt>23900</OtherCostOrOtherBasisAmt>
        <BookValueAmt>23900</BookValueAmt>
      </LandGrp>
      <BuildingsGrp>
        <OtherCostOrOtherBasisAmt>1696271</OtherCostOrOtherBasisAmt>
        <DepreciationAmt>733431</DepreciationAmt>
        <BookValueAmt>962840</BookValueAmt>
      </BuildingsGrp>
      <EquipmentGrp>
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        <DepreciationAmt>149031</DepreciationAmt>
        <BookValueAmt>15416</BookValueAmt>
      </EquipmentGrp>
      <TotalBookValueLandBuildingsAmt>1002156</TotalBookValueLandBuildingsAmt>
      <OtherLiabilitiesOrgGrp>
        <Desc>SALES TAX PAYABLE</Desc>
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      </OtherLiabilitiesOrgGrp>
      <TotalLiabilityAmt>170</TotalLiabilityAmt>
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    <IRS990ScheduleG documentId="RetDoc5">
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        <Event1Nm>SUMMER FUNDRAIS</Event1Nm>
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        <GrossRevenueEvent1Amt>40000</GrossRevenueEvent1Amt>
        <OtherDirectExpensesEvent1Amt>7618</OtherDirectExpensesEvent1Amt>
        <Event2Nm>ANNUAL APPEAL</Event2Nm>
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        <GrossRevenueEvent2Amt>21680</GrossRevenueEvent2Amt>
        <OtherDirectExpensesEvent2Amt>517</OtherDirectExpensesEvent2Amt>
        <GrossReceiptsTotalAmt>61680</GrossReceiptsTotalAmt>
        <GrossRevenueTotalEventsAmt>61680</GrossRevenueTotalEventsAmt>
        <OthDirectExpnssTotalEventsAmt>8135</OthDirectExpnssTotalEventsAmt>
        <DirectExpenseSummaryEventsAmt>8135</DirectExpenseSummaryEventsAmt>
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    <IRS990ScheduleO documentId="RetDoc6">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990 - ORGANIZATION'S MISSION</FormAndLineReferenceDesc>
        <ExplanationTxt>THE MISSION OF THE CHATHAM HISTORICAL SOCIETY IS TO INFORM AND EDUCATE PRESENT AND FUTURE GENERATIONS ABOUT THE HISTORY AND CULTURE OF CHATHAM AND VICINITY BY COLLECTING AND PRESERVING RECORDS OF EARLIER GENERATIONS AND BY EXHIBITING AND INTERPRETING ART, ARTIFACTS, ARCHIVES AND PLACES OF HISTORICAL INTEREST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE TRUSTEES AND OFFICERS ARE ELECTED BY THE MEMBERS AT THE ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 7B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE DECISIONS THAT ARE SUBJECT TO APPROVAL BY THE MEMBERS ARE THE ELECTION OF THE TRUSTEES AND OFFICERS, APPROVAL OF MINUTES OF ANNUAL MEETING, APPROVAL OF TREASURER'S REPORT, AS SUBJECT TO EXTERNAL REVIEW/AUDIT AND AMEND BY LAWS BY 2/3 VOTE AT ANNUAL MEETING.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 11B</FormAndLineReferenceDesc>
        <ExplanationTxt>THE AUDIT COMMITTEE REVIEWS THE DRAFT REPORT, AND PROVIDES A RECOMMENDATION TO THE TRUSTEES. COMPLETED DRAFT IS SENT VIA EMAIL TO ALL TRUSTEES. QUESTIONS AND CLARIFICATIONS ARE ANSWERED AND ANY CHANGES NECESSARY ARE MADE TO THE DOCUMENT. BOARD TREASURER IS THE PERSON RESPONSIBLE FOR THIS PROCESS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 12C</FormAndLineReferenceDesc>
        <ExplanationTxt>TRUSTEES MUST ANNUALLY COMPLETE A LETTER DESCRIBING ANY CONFLICTS AS APPROPRIATE. THE SOCIETY'S CONFLICT OF INTEREST POLICY PROVIDES FOR REVIEW AND DISPOSITION OF POTENTIAL CONFLICTS.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 15A</FormAndLineReferenceDesc>
        <ExplanationTxt>THE SOCIETY PARTICIPATED IN A FORMAL SALARY SURVERY DONE BY NEMA (NEW ENGLAND MUSEUM ASSOCIATION). THE REPORT WAS RELEASED IN NOVEMBER 2011. FOR DETERMINING THE EXECUTIVE DIRECTOR'S COMPENSATION THE SOCIETY CHOSE A MID POINT SALARY APPROPRIATE FOR THEIR SIZE MUSEUM.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PAGE 6, PART VI, LINE 19</FormAndLineReferenceDesc>
        <ExplanationTxt>ALL DOCUMENTS ARE AVAILABLE AT THE SOCIETY OFFICE UPON REQUEST.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART IX, LINE 24E</FormAndLineReferenceDesc>
        <ExplanationTxt>ADVERTISING 5,145 0 0 GROUNDS/LANDSCAPING 4,485 0 0 BUILDING REPAIRS 3,862 0 0 PRINTING 0 2,096 1,547 OFFICE SUPPLIES 0 2,799 704 PROFESSIONAL FEES 0 3,350 0 NEWSLETTER EXPENSE 3,204 0 0 MAINTENANCE 2,966 0 0 POSTAGE 0 924 1,697 SERVICE CHARGES 935 0 935 VOLUNTEER EXPENSE 1,637 0 0 SECURITY 1,625 0 0 CAPITAL PROJECTS EXPENSE 1,594 0 0 LIABILITY INSURANCE - D&amp;O 0 1,277 0 DUES 0 1,180 0 PAYROLL SERVICE 0 1,128 0 EQUIPMENT REPAIRS 616 0 0 INSURANCE - SERVIING POLI 0 0 416 TOTAL 26,069 12,754 5,299</ExplanationTxt>
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      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990, PART XI, LINE 9</FormAndLineReferenceDesc>
        <ExplanationTxt>BOOK / TAX DEPRECIATION DIFFERENCE -1</ExplanationTxt>
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  </ReturnData>
</Return>