20 BULLETIN 56, UNITED STATES NATIONAL MUSEUM. 



at Tinajas Altas, and made a careful exploration of the Gila Moun- 

 tains, this portion of which is known as the Sierra de las Tinajas 

 Altas, and of the Lechuguilla Desert east of them. 



/■', bruary .!■'> to March /, 1894- — Owing to the looseness of the sand. 

 and the great number of burrows of the desert kangaroo rat (Dipo- 

 domys deserti), which made hauling difficult for the teams upon the 

 Yuma Desert, it was considered best to take another route to Yuma. 

 Accordingly, we moved north to the Gila River and camped at 

 Adonde Siding, on the Southern Pacific Railroad, where we remained 

 until March 1. 



March 1 to 13, 1894- — On March 1, we broke camp at Adonde and 

 moved down the Gila River to Gila City, a station on the Southern 

 Pacific Railroad, at the north extremity of the Gila Mountains. AYe 

 stayed at Gila City until March 5, when we followed the Gila River 

 to its confluence with the Colorado River, and pitched camp at the 

 town of Yuma, Arizona, on the south bank of the Gila, remaining 

 there until March 18. 



March 1-1 to /->, 1894- — On March 13, my camp was moved from 

 Yuma to the Boundary at Monument No. 204, in the Colorado River 

 bottom, at the western edge of the Yuma Desert. This was the base 

 camp until March 31. 



Mauli 15 to 10, 1804- — On March 15 I moved out eastward upon 

 the Yuma Desert as far as Monument No. 200, where I spent the 

 night, and returned to Monument No. 204 the next day. Mammals 

 were trapped and the desert explored east to Monument No. 198. 



March 17 to .J J. 1894' — I R cam}) at Monument No. 204, collecting 

 on the edge of the Yuma Desert and in the Colorado River bottom. 



March .!■'> to 30, 1894- — Having arranged to explore the lower por- 

 tion of the Colorado River, I set out on March 23, accompanied by 

 two soldiers, with an army wagon hauled by eight mules, and trav- 

 eled 48 kilometers (30 miles) to a well, where we camped for the 

 night. On the morning of March 24 we arrived at the Mexican 

 settlement of Colonia Diaz, where a Cocopah Indian helper and guide 

 was procured, after which we proceeded to a point opposite to the 

 month of Hardy River and made our camp. From the camp at 

 Hardy River we explored the Colorado to its mouth, and did not 

 begin the return journey until March 20, when we reached La Carpa, 

 arriving at Monument No. 204 on the night of March 30. 



March 31 to April 0, 1894' — On March 31, we moved camp up the 

 Colorado to Yuma, Arizona, and crossed the Colorado River and 

 went into camp at old Fort Yuma. California, on April 1. From 

 April 1 to 6 we were engaged in packing and shipping the collections 

 ,ind in gathering specimens in the vicinity of the camp. 



April 7 to IS, 1894' — On April 7. Ave began the journey across the 

 Colorado Desert, advancing to Cooks Wells, where we spent the 



