Articles of Agreement and Convention : made and concluded at the City of Washington, on the twenty-eighth day of February, in the year of our Lord, on thousand eight hundred and thirty-one, by and between James B. Gardiner, specially appointed Commissioner on the part of the United States, of the one part, and the undersigned, principal Chiefs and Warriors of the Seneca tribe of Indians, residing on the Sandusky river in the State of Ohio, on the part of said tribe, of the other part : for the cession of lands now owned and occupied by the said tribe of Indians ...