Boston Marine Society. Telegraphic circular. Conversation flag. To Mr. John R. Parker, Sir ... Boston, Jan. 1827. CBoston, 1827]
proadside. illus. 25x20cm.
Signed at end: Samuel M. Holland, Thomas B. Curtis, Committee of Observation of the Boston Marine Soc.
Reccommends use of J.M. Elford's system of marine signals or telegraphic flags.