Photograph of Hollenberg Station
A station house owned by Gerat H. and Sophia Hollenberg, not only accommodated travelers on the Oregon and California Trails, but operated as a Pony Express station used by riders for exchanging horses for fresh horses, or to hand the mail over to a new rider and fresh horse along the route from Missouri to California. The riders carried the mail in four pockets of a saddlebag called a mochila. When the rider arrived at the station, only the stationmaster had the keys to unlock one of the pockets to retrieve the letters wrapped in oil silk for protection. This same pocket held a time card on which the stationmaster was required to record the arrival time of the rider.
Courtesy of Library of Congress.