Unpublished letter, regarding mathematical paper by John Walsh from Benjamin Gompertz to Davies Gilbert Gompertz critiques John Walsh's paper (AP/10/16), writing that Walsh does not sufficiently express the way that lengths, surfaces, and solids are to be bounded to facilitate his arguments. Includes a diagram in the text. Subject: Mathematics Written by Gompertz at the Alliance Office on Bartholomew Lane [London]. 25 March 1830