John A. Dahlgren (1809 1870 Union rear admiral inventors of the cannon which bore his name also commanded the South Atlantic Blockading Squadron Als I p. 8vo on board the "Powhatan" at Calao, May 27 1867 to Adm. G. F. Emmons. in part I intended to spend part of the evening with you but seeing the evidence of steam concluded you would be busy and fore bore So goodbye again Slight marginal wear a collectors note at bottom far from text