This is a common cover with a #26 postmarked SAN FRANCISCO/JUN/22/1858/CA. It was addressed to Placer County, CA. The envelope was partially printed for use among the Masons Lodges. In less than 10 years, San Francisco became a very large city. This year, 1858, was an important year for us philatelists. In 1858, the Overland Mail Co. started carrying mails between San Franciaco and St. Louis. QUOTE:
"With California booming, thanks to the 1849 Gold Rush, Americans east and west had been clamoring for faster and surer transcontinental mail service for years. Finally, in March 1857, the U.S. Congress passed an act authorizing an overland mail delivery service and a $600,000 yearly subsidy for whatever company could succeed in reliably transporting the mail twice a week from St. Louis to San Francisco in less than 25 days. The postmaster general awarded the first government contract and subsidy to the Overland Mail Company. Under the guidance of a board of directors that included John Butterfield and William Fargo, the Overland Mail Company spent $1 million improving its winding 2,800-mile route and building way stations at 10-15 mile intervals. Teams of thundering horses soon raced across the wide open spaces of the West, pulling custom-built Concord coaches with seats for nine passengers and a rear boot for the mail."