Signal book for Boston Harbor [microform] /
Boston : J. Howe's Sheet Anchor Press,
1845.
"Offices ... Wharf, and Merchants' Exchange."
"Telegraph Addenda, from April 1, 1846, to Nov. 1, 1847": P. 1-5 (2nd group)
Sabin 33500
Microfiche.
Signals and signaling
Shipping