After the defeat of the Insurrection he stayed at the Tarnowskis’ in Dzików, in 1795 he returned to Wołyń to manage his estate.
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During the Kościuszko Insurrection, Feliński was Tadeusz Kościuszko’s secretary for French correspondence as well as the law and order commissar in Wołyń.
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Feliński was a representative of the classicism typical of the time after Stanisław Poniatowski’s reign.