Lot
722 
Steamer Parthenius, May 16, 1875 (San Francisco Bay), blue double circle handstamp on 3¢ postal entire to San Francisco, cancelled on arrival with "San Francisco May 17" cds & segmented grid, Very Fine and rare, Unlisted in Milgram.Milgram No. 1055B Estimate $500 - 750.
THIS MAY BE THE ONLY EXAMPLE OF THIS RARE CALIFORNIA STEAMBOAT MARKING.
Isaiah W. Gillpatrick advertised that he would run a daily express service through the use of the Steamer "Parthenius". This express provided a service between San Francisco and the river ports of Vallejo, Benicia, Martinez, Black Diamond landing, Pittsburg Landing and Antioch. He also connected inland to the coal mining towns of Somersville, Nortonville and Clayton. He lasted from May 1871 to about July 1872.
Realized: $500