Post-Office, Salem, July 15, 1819 A very general misunderstanding amongst ship masters and merchants respecting the law relating to ship letters, prevailing in this place, induces the post master to give this notice of the law, and his instructions under it - Sprague, Joseph E. (s.n, 1819)
Includes "Instructions from the post-master general. - Shaw & Shoemaker, 49990. - Signed: Joseph E Sprague, post-master