Bust-length portrait with head turned to the right, in front of a tan-gray background. The subject has brown hair, blue eyes, and a pale complexion. He wears a brown militia-man's uniform, a white neckcloth, and a black, tricorn hat decorated with a Captain's gold braid and button. Unsigned and undated.

Three-quarter length portrait of figure seated at a cloth-covered table, facing left. The subject holds papers in his left hand, and his right hand is raised to his face, where he rests his chin on his thumb. He wears spectacles and a powdered wig, as well as a blue coat with gold buttons and ribbon and a white shirt with ruffled sleeves. Additional books and papers are scattered on the table in the left background. Along the left side of the canvas, facing the sitter, is a large, bronze bust of Isaac Newton. Behind the bust is red drapery. Unsigned and undated.

Seated figure in a Chippendale-style chair is shown to below the waist, his body turned to the left. The subject's hands are crossed on the table in front of him and he holds a red pencil in his right hand, with which he gestures at notepaper with a diagram. His hair and eyes are gray and he has a rosy complexion. The subject wears a brocade banyan with rose lining, a white, buttoned waistcoat, and a white neckcloth, collar, and ruffle. The background is a shaded, greenish-gray. Unsigned and undated.