Thompson & Co's & Wells, Fargo & Co's. Paid Over California Routes, frank (Haller FT4), printed express company frank in double-lined box, on 3c Red on buff Nesbitt entire (U10), cancelled by partly clear blue oval 'Thompson & Co's Express, Healdsburg (Cal.)', ms. crayon note indicating local delivery, to San Francisco, top backflap defects, trivial edge toning, still fresh and fine, very scarce, this company operated between Petaluma and Santa Rosa Cal., 1857, closely affiliated with Wells, Fargo, ex Pearce