John A. Dahlgren A.L. S. 4pp. 8vo., onboard the Powhatan at Arica, Sep. 13, 1867 to Adm. G. F. Emmons. Dahlgren discusses his ongoing voyage to Valparaiso with his wife sailing to join him on a mail steamer under protection of an English flag - which I'm sure I don't relish very well... it will be rather a coal visit . Owner adds rank beside signature at conclusion. Very good.