Chap. XV. RIGHT BANK OF TAMBOPATA. 2(J3 



be distinguisliecl from that of C. Calisaya. Whilst climbing 

 amongst these rocks, I nearly put my hand on a small 

 viper of a most venomous kind, 18 inches long, with a black 

 skin marked with yellow rings, edged with white. In the 

 evening we returned to Gironda's clearing at Lenco-huayccu, 

 with eighty-seven chinchona-plants, sixteen of Calisaya fina 

 ((7. Calisaya, var. a vera), and sixty-nine of Calisaya morada 

 (C, Boliviana, Wedd.). 



We found Gironda, on whom we were now entirely depen- 

 dent for food, very Httle better off than ourselves. His 

 supplies consisted of maize, yucas, aracachas, chunus or 

 frozen potatoes, and quispinas, made of boiled quiuoa-grains 

 dried in the sun, ground, and preserved as little gritty 

 hard lumps. He also had some achocelies, wliich are poor 

 watery cucm'bitaceous things, squeezed, and served up in 

 chupes. No salt. 



Though frequently baffled, and more than once exposed to 

 much risk in making vain attempts, I had never given up 

 my determination to have at least one day's work on the 

 right bank of the Tambopata. For some days the volume 

 of water had been gradually decreasing, but it was still 

 40 yards across, and rushing with great velocity over a ford 

 which Gironda believed to exist a little below Lenco-huayccu. 

 I stripped and went in, with the stem of a young chonta 

 palm as a support, but, on approaching the mid-chamiel, the 

 water came up above my middle, the large pebbles slipped 

 and rolled under my feet, and for some time it was with the 

 utmost difficulty that I held my own; but finally we all 

 reached the right bank in safety. 



We were rewarded by a very sucessful day's work. After 

 ascending the steep ravine, thi-ough the zone of bamboos, 

 to a height of 400 feet, we reached a ridge of rocks, where 

 we collected 109 good chinchona-plants of the Calisaya 

 morada species. The leaves of the chinchonaB, and more 



