1850s-1860s Steamboat Mail, balance of 12 franked covers bearing "Steamboat" handstamps, including #11A with Detroit "Steamboat, Due 6 Cents" oval handstamp on reduced legal-size cover, #11A with Savannah Ga. "Steam Boat" straightline, #11A with blue Buffalo fancy "Steam-Boat" handstamp, #26 tied by blue Baltimore "Steamboat" straightline and matching "Due 2cts." straightline, #65 pair with blue Chicago "Steamboat" straightline, and #11A with New Bedford "Steamboat" straightline; some faults, F.-V.F. and scarce group. Estimate  $750 - 1,000. $0 (Image)