“The appellees instituted this suit in the High Court of Chancery, in order to recover back certain warrants, and the interest received upon them, also warrants for about 5000 acres of land, which their testator had obtained for his services during the war, and which had been unfairly purchased from him by the appellants, for the trifling consideration of £20, at a time when, the testator was intoxicated with liquor, and incapable of contracting.