MAMMALS OF THE MEXICAN BOUNDARY. 15 



Bernardino Valley was explored, and numerous visits were made to 

 Cajon Bonito Creek to the southward. 



August 30, 1893. — Rode through Guadalupe Canyon to the Animas 

 Valley, and camped there for the night. 



August 31, 1893. — Moved to Lang's Ranch and pitched camp, climb- 

 ing thence to near the summit of the San Luis Mountains, returning 

 to camp the same night. 



September 1 to 9, 1893. — Camped at Lang's Ranch. Several excur- 

 sions were made to the San Luis Mountains, the west side of which 

 was explored from base to summit; and on September 8 and 9 a trip 

 was made to Cajon Bonito Creek, both forks of which were explored. 



September 10, 1893. — Moved camp from Lang's Ranch to White 

 Water, Chihuahua, near Monument No. 61. 



September 11, 1893. — Rode to San Francisco Canyon, about 16 kilo- 

 meters (10 miles) south of the Boundary, and climbed, on the east 

 side, to the summit of the San Luis Mountains, returning to camp at 

 White Water during the following night. 



September 12 to 15, 1893. — Camped at White Water, whence the 

 eastern base of the San Luis Mountains and the Play as Valleys were 

 explored until September 15, when camp was moved to Dog Spring, 

 Grant County, New Mexico, near Monument No. 55. 



September 16 to 22, 1893. — Camped at Dog Spring, from which 

 point Emory Peak and other portions of the Dog Mountains were 

 carefully explored ; and trapping for mammals was carried on in the 

 immediate vicinity of the camp. 



September 23, 1893. — Having remained with the Monument-Build- 

 ing Party until their work on parallel 31° 21' was about finished, I 

 obtained authority to return over the Boundary Line as far west as 

 Nogales, in order to examine the country to the westward of the San 

 Pedro River, which I had never seen, and then to proceed up the Santa 

 Cruz River to the headquarters of the International Boundary Com- 

 mission, then located in Tucson, Arizona. Accordingly I started to 

 retrace my steps on September 23, when I moved camp to a temporary 

 stream in a canyon at the eastern base of the San Luis Mountains and 

 encamped for the night. 



September 24 to October 2, 1893. — The water having ceased to flow 

 during the night, the wagons were sent around by way of San Luis 

 Pass to Lang's Ranch on September 24, while I crossed the San Luis 

 Range over Irwins Pass, near Monument No. 65. Lang's Ranch or 

 San Luis Springs remained our base camp until October 2. During 

 this stay the western slopes of the San Luis Mountains were once 

 more examined from base to summit, and the adjacent plain of the 

 Animas was explored. On September 27, accompanied by Hospital 

 Steward Ernest C. Merton, I rode to the forks of Cajon Bonito Creek 

 and camped there for the night, returning to Lang's Ranch September 



