1867-1870s Chesapeake Bay and Potomac Balance, group of 10 steamboat covers including agent postmarks including 1860s "Balt. & Norfolk Mar 5" agent cds on stampless cover; #65 tied by river mail J.H. Bunce agent cds (faulty); #158 pair on Baltimore steamboat cover; 1877 "Bay Line Steamer" cds on 3¢ entire; and three red and one black Potomac Steamboat cds covers; some faults, F.-V.F. Estimate  $300 - 400. $0 (Image)