In 1848 the US Congress, in order to render the West Coast more accessible, authorized
the establishment of two mail lines of steamships, the one from New York and New Orleans
to Chagres in Panama, and the other to connect with this by the Isthmus of Panama,
from Panama City to California and Oregon.

The
60 mile journey by mule trail and canoe across the Isthmus of Panama was slow until
the
first transcontinental railroad was completed across the Isthmus in 1855. This route
served as the principal method of mail transport between the East and West coast until
1869. During this time, the trip between New York and San Francisco could be completed
in 21 days or less. Between 1855 and 1867 more than $700 million in California gold
was carried on the Panama railroad.

This cover was postmarked in New York on Jul 21, 1856. From the docketing on the left
side, it arrived in San Francisco 24 days later on August 14th. To make the journey in
this short amount of time, it was carried by steamship from New York south to Chagres,
Panama, then 60 miles by train to Panama City on the West Coast, and by ship again
on the Pacific coast up to California.

The cover, bearing a copy of Scott #15 imperforate 10c Washington stamp, is addressed
to Mr. Stephen L. Merchant, U. S. Mint, San Francisco.

Stephen L. Merchant was Superintendent Peter Lott's principal clerk. The San Francisco
Mint was opened just two years earlier in 1854 to serve the gold mines of the California
Gold Rush, producing coins for commerce such as the $3 gold piece pictured below.
