The Plea of the Colonies, on the charges brought against them by Lord M....d [Mansfield] and others, in a letter to his Lordship. [By Hugh Williamson.].

A later ed., Philadelphia, 1777, has mansfield spelled out in title and adds "By a native of Pennsylvania." Evans 15713 attributes the authorship to Hugh Williamson and is supported by the biographical sketch in the D.A.B.