Quart 1948 Journal 138 June 26 Los Martires, 300+ ft, 23 mi by road NW San Ignacio, Baja Calif. desert plain surrounded by Cardone, sand, Cholla, and low bushes. Just south of this place, th first Cirios was seen. June 26 Arroyo San Louis, 800+ ft, 9 mi W Calmalli, Baja California Arrived here just before sunset and investigated a nearby mine called "Minio de la San Louis". It is located several miles from the north junction of its main road and the one leading to Calmalli. and near the latter road. The mine is located on the north side of the arroyo and its tailings are visible from the road. The mine is composed of a horizontal tunnel of about 50 yards length the narrower portions of which are about 4 x 5 feet. Towards the end of the tunnel several small side passages exist and the tunnel roof gets higher, finally connecting with the back end of a vertical slope leading to the surface near the top of the hill. The slope is 30 or forty feet deep and its 6 foot width is braced with cross timber. The back part of the slope is dark where it connects with the rear of the tunnel. The mine has undoubtedly been in disuse for many years, part of the iron rails being torn up, a light barricade being erected within its entrance and what appears to be a corral placed around its entrance. The level of