Line in 1938, ownership passed to American President Lines, but by this time, PMSS essentially existed only on paper. It was formally closed down in 1949, after just over a century of existence. Ships of the Pacific Mail Steamship Company (1848–1866, 1872–1874): Built for the company, it was launched May 19, 1848 by William H. Webb, New York. It left New York on October 6, 1848 for Valparaiso, Panama City and San Francisco and then operated between San Francisco and Panama regularly until 1854. She was used as a spare steamer at San Francisco in 1856 and at Panama City in 1857. She made San Francisco to Panama City voyages for Pacific Mail in 1860, 1861 and 1866 and was later sold to the California, Oregon & Mexico Steamship Company. Returned to Pacific Mail in 1872, she was sold to Goodall, Nelson & Perkins in 1874. SS Oregon (1848–1861): Built for the company, it was launched on August 5, 1848 and sailed from New York for San Francisco on December 8, 1848, calling at Panama City and arriving at San Francisco on April 1, 1849. Used regularly on the San Francisco to Panama City route until 1855 and made one further voyage in 1856. Subsequently used on the San Francisco to Columbia River service and was sold to Holladay & Flint in 1861. SS Panama (1848–1861): Built for the company, it was launched on July 29, 1848. She sailed from New York on February 15, 1849 and arrived San Francisco on June 4. She then sailed regularly between San Francisco and Panama City until 1853, made a single voyage in 1854 and in 1856–57 was used as a spare steamer at Panama City. From 1858 she was used on the San Francisco to Columbia River service, until she was sold to Holladay & Flint in February 1861. The Panama was sold to the Mexican government in 1868 and was renamed the Juarez. SS Tennessee (1849–1853): Launched in 1848. Purchased by Pacific Mail Steamship Company, she left New York on December 6, 1849, arrived at Panama City on March 12, 1850 and San Francisco on April 14. She operated between San Francisco and Panama City until March 6, 1853 when she went aground in dense fog near San Francisco and broke up. Her passengers, mail and baggage were saved. SS Carolina (1849–1854): Completed in December 1849, she was sold to Pacific