Gregory's Express, Sacramento. Bold strike of blue oval handstamp on folded letter sheet to Long Island, N.Y., red "Gregory's, Atlantic and Pacific Express, Central Office 280 Montgomery Street, San Francisco" handstamp at top and manuscript "Pd through to N Yk, G.E.C." endorsement, Extremely Fine. Estimate  $500 - 750. $0 (Image)

Gregory's Express, Sacramento. Large part of blue oval handstamp on 1851 folded letter from Sacramento to San Francisco, with matching "Not Paid" in oval handstamp at top, Very Fine. Estimate  $150 - 200. $0 (Image)