Butch Cassidy recruited Harry Alonzo Longabaugh, also known as "The Sundance Kid", a native of Pennsylvania, into the Wild Bunch. In early 1897, Cassidy was joined at Robbers Roost by Ann Bassett, Elzy Lay, and Lay's girlfriend Maude Davis. The four hid there until early April, when Lay and Cassidy sent the women home so that the men could plan their next robbery. On April 22, 1897, in the mining town of Castle Gate, Utah, Cassidy and Lay ambushed a small group of men carrying the payroll of the Pleasant Valley Coal Company, stealing a sack containing $7,000 in gold, with which
Butch Cassidy American bandits believed to be Cassidy and Longabaugh. Three days later, a pair of Americans suspected of being the bandits were seen in the small mining town of San Vicente, where they lodged in a small boarding house owned by a local resident miner named Bonifacio Casasola. Casasola became suspicious of his two foreign lodgers. A mule they had in their possession was from the Aramayo Mine, identifiable from the mine company's brand on the mule's left flank. Casasola left his house and notified a nearby telegraph officer who notified a small Bolivian Army cavalry unit stationed nearby, the Abaroa