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        <DistributableAsAdjustedAmt>5101462</DistributableAsAdjustedAmt>
      </DistributableAmountGrp>
      <PFQualifyingDistributionsGrp>
        <ExpensesAndContributionsAmt>5970577</ExpensesAndContributionsAmt>
        <ProgramRelatedInvstTotalAmt>0</ProgramRelatedInvstTotalAmt>
        <CharitableAssetsAcquisPaidAmt>0</CharitableAssetsAcquisPaidAmt>
        <SetAsideSuitabilityTestAmt>0</SetAsideSuitabilityTestAmt>
        <SetAsideCashDistriTestAmt>0</SetAsideCashDistriTestAmt>
        <QualifyingDistributionsAmt>5970577</QualifyingDistributionsAmt>
      </PFQualifyingDistributionsGrp>
      <UndistributedIncomeGrp>
        <DistributableAsAdjustedAmt>5101462</DistributableAsAdjustedAmt>
        <UndistributedIncomePYAmt>3405726</UndistributedIncomePYAmt>
        <PriorYear1Yr>2020</PriorYear1Yr>
        <PriorYear2Yr>2019</PriorYear2Yr>
        <PriorYear3Yr>2018</PriorYear3Yr>
        <ExcessDistributionCyovYr1Amt>0</ExcessDistributionCyovYr1Amt>
        <TotalExcessDistributionCyovAmt>0</TotalExcessDistributionCyovAmt>
        <QualifyingDistributionsAmt>5970577</QualifyingDistributionsAmt>
        <AppliedToYear1Amt>3405726</AppliedToYear1Amt>
        <AppliedToCurrentYearAmt>2564851</AppliedToCurrentYearAmt>
        <RemainingDistriFromCorpusAmt>0</RemainingDistriFromCorpusAmt>
        <ExcessDistriCyovAppCYCorpusAmt>0</ExcessDistriCyovAppCYCorpusAmt>
        <ExcessDistributionCyovAppCYAmt>0</ExcessDistributionCyovAppCYAmt>
        <TotalCorpusAmt>0</TotalCorpusAmt>
        <UndistributedIncomeCYAmt>2536611</UndistributedIncomeCYAmt>
        <ExcessDistriCyovToNextYrAmt>0</ExcessDistriCyovToNextYrAmt>
        <ExcessFromCurrentYearAmt>0</ExcessFromCurrentYearAmt>
      </UndistributedIncomeGrp>
      <PrivateOperatingFoundationsGrp></PrivateOperatingFoundationsGrp>
      <SupplementaryInformationGrp>
        <OnlyContriToPreselectedInd>X</OnlyContriToPreselectedInd>
        <GrantOrContributionPdDurYrGrp>
          <RecipientBusinessName>
            <BusinessNameLine1Txt>SEE STATEMENT</BusinessNameLine1Txt>
          </RecipientBusinessName>
          <RecipientUSAddress>
            <AddressLine1Txt>7700 OLD GEORGETOWN ROAD</AddressLine1Txt>
            <AddressLine2Txt>800</AddressLine2Txt>
            <CityNm>BETHESDA</CityNm>
            <StateAbbreviationCd>MD</StateAbbreviationCd>
            <ZIPCd>20814</ZIPCd>
          </RecipientUSAddress>
          <RecipientFoundationStatusTxt>PC</RecipientFoundationStatusTxt>
          <GrantOrContributionPurposeTxt>CHARITABLE PURPOSES.</GrantOrContributionPurposeTxt>
          <Amt>5559414</Amt>
        </GrantOrContributionPdDurYrGrp>
        <TotalGrantOrContriPdDurYrAmt>5559414</TotalGrantOrContriPdDurYrAmt>
      </SupplementaryInformationGrp>
      <AnalysisIncomeProducingActyGrp>
        <FeesContractsFromGovtAgGrp />
        <MembershipDuesAndAssmntGrp />
        <IntOnSavAndTempCashInvstGrp>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>137583</ExclusionAmt>
        </IntOnSavAndTempCashInvstGrp>
        <DividendsAndInterestFromSecDtl>
          <ExclusionCd>14</ExclusionCd>
          <ExclusionAmt>1938956</ExclusionAmt>
        </DividendsAndInterestFromSecDtl>
        <NetRntlIncmReDebtFincdPropGrp />
        <NetRntlIncmReNotDebtFincdProp />
        <NetRentalIncomePersonalPropGrp />
        <OtherInvestmentIncomeGrp />
        <GainSalesAstOthThanInvntryGrp>
          <ExclusionCd>18</ExclusionCd>
          <ExclusionAmt>1264114</ExclusionAmt>
        </GainSalesAstOthThanInvntryGrp>
        <NetIncomeLossFromSpecialEvtGrp />
        <GrossProfitLossSlsOfInvntryGrp />
        <SubtotalsIncmProducingActyGrp>
          <ExclusionAmt>3340653</ExclusionAmt>
        </SubtotalsIncmProducingActyGrp>
        <TotalIncomeProducingActyAmt>3340653</TotalIncomeProducingActyAmt>
      </AnalysisIncomeProducingActyGrp>
      <TrnsfrTransRlnNonchrtblEOGrp>
        <TrnsfrOfCashToNonchrtblEOInd>false</TrnsfrOfCashToNonchrtblEOInd>
        <TrnsfrOtherAssetNonchrtblEOInd>false</TrnsfrOtherAssetNonchrtblEOInd>
        <SalesOrExchangesOfAssetsInd>false</SalesOrExchangesOfAssetsInd>
        <PurchaseOfAssetsNonchrtblEOInd>false</PurchaseOfAssetsNonchrtblEOInd>
        <RentalOfFacilitiesOthAssetsInd>false</RentalOfFacilitiesOthAssetsInd>
        <ReimbursementArrangementsInd>false</ReimbursementArrangementsInd>
        <LoansOrLoanGuaranteesInd>false</LoansOrLoanGuaranteesInd>
        <PerformanceOfServicesEtcInd>false</PerformanceOfServicesEtcInd>
        <SharingOfFacilitiesEtcInd>false</SharingOfFacilitiesEtcInd>
        <RelationshipsNonchrtblEOInd>false</RelationshipsNonchrtblEOInd>
      </TrnsfrTransRlnNonchrtblEOGrp>
    </IRS990PF>
    <AccountingFeesSchedule documentId="AccountingFeesSch">
      <AccountingFeesDetail>
        <CategoryTxt>ACCOUNTING FEES</CategoryTxt>
        <Amt>20400</Amt>
        <NetInvestmentIncomeAmt>7450</NetInvestmentIncomeAmt>
        <DisbursementsCharitablePrpsAmt>7450</DisbursementsCharitablePrpsAmt>
      </AccountingFeesDetail>
    </AccountingFeesSchedule>
    <DepreciationSchedule documentId="DepreciationSch" />
    <InvestmentsCorpBondsSchedule documentId="InvestCorpBondsSch">
      <InvestmentsCorporateBondsGrp>
        <BondNm>HARBOR CORP BONDS-SEE ATTD</BondNm>
        <EOYBookValueAmt>10138813</EOYBookValueAmt>
        <EOYFMVAmt>9315747</EOYFMVAmt>
      </InvestmentsCorporateBondsGrp>
    </InvestmentsCorpBondsSchedule>
    <InvestmentsCorpStockSchedule documentId="InvestCorpStockSch">
      <InvestmentsCorporateStockGrp>
        <StockNm>126,675 SHS MARRIOTT INTL</StockNm>
        <EOYBookValueAmt>4649255</EOYBookValueAmt>
        <EOYFMVAmt>25779629</EOYFMVAmt>
      </InvestmentsCorporateStockGrp>
    </InvestmentsCorpStockSchedule>
    <InvestmentsGovtObligationsSch documentId="InvGovtObligSch">
      <USGovtObligationsBookVlEOYAmt>14916906</USGovtObligationsBookVlEOYAmt>
      <USGovtObligationsEOYFMVAmt>14021775</USGovtObligationsEOYFMVAmt>
    </InvestmentsGovtObligationsSch>
    <InvestmentsOtherSchedule2 documentId="InvOtherSch2">
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>HARBOR MUTUAL FUNDS-SEE ATTD</CategoryOrItemTxt>
        <BookValueAmt>22865341</BookValueAmt>
        <EOYFMVAmt>25365929</EOYFMVAmt>
      </InvestmentsOtherGrp>
      <InvestmentsOtherGrp>
        <CategoryOrItemTxt>HARBOR EXCH TRD PROD-SEE ATTD</CategoryOrItemTxt>
        <BookValueAmt>23340432</BookValueAmt>
        <EOYFMVAmt>31599131</EOYFMVAmt>
      </InvestmentsOtherGrp>
    </InvestmentsOtherSchedule2>
    <LegalFeesSchedule documentId="LegalFeesSch">
      <LegalFeesGrp>
        <CategoryTxt>LEGAL FEES</CategoryTxt>
        <LegalFeesAmt>5726</LegalFeesAmt>
        <DisbursementsCharitablePrpsAmt>5726</DisbursementsCharitablePrpsAmt>
      </LegalFeesGrp>
    </LegalFeesSchedule>
    <OtherDecreasesSchedule documentId="OtherDecreasesSch">
      <OtherDecreasesDetail>
        <Desc>BALANCE SHEET ADJUSTMENT - TIMING</Desc>
        <Amt>11798</Amt>
      </OtherDecreasesDetail>
    </OtherDecreasesSchedule>
    <OtherExpensesSchedule documentId="OtherExpensesSch">
      <OtherExpensesScheduleGrp>
        <Desc>COMPUTER SOFTWARE</Desc>
        <RevenueAndExpensesPerBooksAmt>14512</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>14512</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>ORGANIZATIONAL EXPENSES</Desc>
        <RevenueAndExpensesPerBooksAmt>723</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>723</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>SUPPLIES</Desc>
        <RevenueAndExpensesPerBooksAmt>559</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>559</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>POSTAGE</Desc>
        <RevenueAndExpensesPerBooksAmt>250</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>250</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>RENTAL EQUIPMENT</Desc>
        <RevenueAndExpensesPerBooksAmt>2513</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>2513</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>MISC. ADMIN EXPENSES</Desc>
        <RevenueAndExpensesPerBooksAmt>2675</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>2675</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>NONEMPLOYEE INSURANCE</Desc>
        <RevenueAndExpensesPerBooksAmt>5949</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>5949</NetInvestmentIncomeAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>BOOKS,SUBSCRIPTIONS,REFERENCE</Desc>
        <RevenueAndExpensesPerBooksAmt>23</RevenueAndExpensesPerBooksAmt>
        <DisbursementsCharitablePrpsAmt>23</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
      <OtherExpensesScheduleGrp>
        <Desc>MOVING EXPENSES</Desc>
        <RevenueAndExpensesPerBooksAmt>4199</RevenueAndExpensesPerBooksAmt>
        <NetInvestmentIncomeAmt>339</NetInvestmentIncomeAmt>
        <DisbursementsCharitablePrpsAmt>3565</DisbursementsCharitablePrpsAmt>
      </OtherExpensesScheduleGrp>
    </OtherExpensesSchedule>
    <OtherIncomeSchedule2 documentId="OtherIncomeSch2">
      <OtherIncomeDetail>
        <Desc>TAX REFUND</Desc>
      </OtherIncomeDetail>
    </OtherIncomeSchedule2>
    <OtherIncreasesSchedule documentId="OtherIncreasesSch">
      <OtherIncreasesDetail>
        <Desc>FMV ADJUSTMENT ON DONATED SECURITIES</Desc>
        <Amt>749414</Amt>
      </OtherIncreasesDetail>
    </OtherIncreasesSchedule>
    <OtherProfessionalFeesSchedule documentId="OthProfFeesSch">
      <OtherProfessionalFeesDetail>
        <CategoryTxt>INVESTMENT MANAGEMENT FEES</CategoryTxt>
        <Amt>79026</Amt>
        <NetInvestmentIncomeAmt>79026</NetInvestmentIncomeAmt>
      </OtherProfessionalFeesDetail>
      <OtherProfessionalFeesDetail>
        <CategoryTxt>BANK CHARGE</CategoryTxt>
        <Amt>127</Amt>
        <DisbursementsCharitablePrpsAmt>127</DisbursementsCharitablePrpsAmt>
      </OtherProfessionalFeesDetail>
    </OtherProfessionalFeesSchedule>
    <TaxesSchedule documentId="TaxesSchedule">
      <TaxesDetail>
        <CategoryTxt>ESTIMATED TAX PAYMENTS</CategoryTxt>
        <Amt>30000</Amt>
      </TaxesDetail>
    </TaxesSchedule>
  </ReturnData>
</Return>
