(San Francisco) Incoming Circular Rate Cover. 1851 1¢ blue, type II, single (cut in to very large margins at right and bottom) tied by "New-York, Apr 26" cds on unsealed circular rate cover to San Francisco, Post Office Box "1394" pencil notation for delivery, Very Fine, a rare example of a 1¢ circular rate across the continent. Estimate  $200 - 300. $0 (Image)