[7][8] Clarke resigned from the army in December, 1843 and practiced law in New York City and Westchester County.
[9] Also in December, 1843 he married Alletta Remsen Lawrence, a member of another prominent New York family.
[14][15][16] In mid-1861 there were news accounts indicating that Clarke would be commissioned a brigadier general and assigned to command a school for cavalry in Westchester County.
This plan does not seem to have been carried out, since there are no further references to Clarke's promotion or the operation of a cavalry school in Westchester County.
[22] He later resided in Florida during the winter and an island on Schroon Lake, New York during the summer.