Quest 1948 Journal 40 April 29 Mission San Ignacio 500 ft Baja California something not seen previously in the north. The road became bad and was composed of small boulders entirely in some places. The terrain covered today can be divided into three regions: one, the fertile, heavy vegetation before El Arco; two, the shifting sand region to Los Angeles Canal with very sparse vegetation, mostly creosote brush and a few cardons; and then, the arid lava boulder region to San Ignacio with creosote (sparse) and a few diseased and dead Cardones. The road travels over what appears to be eroded lava plateau material, the intact lava cap rock and mountains being visible to the east during the whole day. The mine at El Arco has been in disuse for a few years, but all the machinery and buildings are still standing, some being badly in need of repair. Water has filled the deep portions of its shaft (below approx 150 ft of its surface), and we explored the diggings on the intervening level for bats, but none were found. Dr. Benson caught two Myotis volans that had been hiding in the thatched palm-fond roof of a dilapidated adobe