On April 3, 1860, the eastern Pony Express mail arrived late by train, so to save time the Pony Express Company, located in the Patee House at 12th and Penn Streets, had the mail taken directly to the post office, which stood closer to the ferry landing on the east side of Second Street 120 feet north of Francis St. The mail was first put into the four castinas, pockets of the mochila, and consisted of a few newspapers printed on lightweight paper, 49 letters, and 9 telegrams. It was then wrapped in oiled skin for additional weatherproofing. The first Pony Express left from the post office at 7:15 p.m. and, after nearly 2,000 miles, arrived in San Francisco at 1:00 a.m. on April 14, a trip of 10 days, 7 hours, and 45 minutes.