John A. Dahlgren 1809-1870 Union rear admiral and inventor of the cannon which bore his name, also commanded the South Atlantic Blockading Squadron. A.L.S. 1p. 8vo., Washington, Sep. 9, 1865 In part: . My young friend, As I have great regard for American School boys, and you are one of them, let me say that I was absent and only received your note yesterday. Neatly mounted, fine.