R44c 25c Certificate Revenue Stamp, Pacific Mail Steamship Co, early Boxed Cancel
Some of the most popular revenue cancels are those of the Pacific Mail Steamship Company, founded April 18, 1848, as a joint stock company under the laws of the State of New York by a group of New York City merchants, William H. Aspinwall, Edwin Bartlett, Henry Chauncey, Mr. Alsop, G.G. Howland and S.S. Howland. These merchants had acquired the right to transport mail under contract from the United States Government from the Isthmus of Panama to California awarded in 1847 to one Arnold Harris.
Some collected data about the steamships of the P. M. S. S. Co. may be of interest to those collectors of the straightline cancels of this company. To recap briefly, the company had four fleets of ships in addition to those used in local ship lanes on the Pacific coastal trade. The Atlantic line, between New York and Aspinwall, Col.; the Pacific line, between San Francisco and Panama, Col.; the China line, between San Francisco, Yokohama and Hongkong; and the Shanghai branch line between Yokohama and Shanghai…All ships are wooden sidewheelers. – Ships of the Pacific Mail S. S. Co., H. P. Shellabear, M.D. The American Revenuer, October 1962