about 1785. Among his pupils were Thackara, Vallance, and his nephew, Edward Trenchard, who became an officer in the United States Navy, and served in the War of 1812.
Trenchard was one of the owners of the “Columbian Magazine,” published in Philadelphia from 1786 to 1792, and he engraved many plates for its pages.
One signed book-plate of his is known,—the Bloomfield. This is a Chippendale plate of no striking features. The Luther Martin plate is so similar to this as to leave hardly any doubt that it too was by Trenchard.