108 THE CONDOR Vol. XX 



dispatched a couple of experienced young field men to a site in a canyon at the 

 base of Pikes Peak, this state, with full equipment and instructions to employ 

 any necessary local assistance. They were on the ground seven days, during 

 which time they spotted over a dozen nest sites. In every case the nests were 

 located in soft crumbling limestone, and were mostly inaccessible from any 

 point or by any means. A reference to fig. 17 will give a better idea of the 



Fig. 18. Nest and eggs of White-throated Swift (set no. 1); taken near Hot Sul- 

 phur Springs, Colorado, June 24, 1916, by W. C. Bradbury. 



Photo by J. D. Fig-gins. 



methods employed than many words of mine would do. 



The third day, July 12, they phoned me that they had spent a full day on 

 one site to find only a half -completed nest, while most of their other attempts 

 were equally unsuccessful. They had, however, located one promising nest in 

 a crevice twenty feet back and twelve feet up, in a cave located 150 or more 

 feet below the top of a cliff and seventy-five feet above the creek below. They 



