40 REPORT UNITED STATES GEOLOGICAL SURVEY. 



to the courtesies extended to us at the posts. Much of the country over 

 which we had passed is exceedingly sterile and difficult to survey with 

 any sort of comfort, but agaiu we found regions more delightful than 

 which there are probably few in existence within the llocky Mountains. 

 All danger from Indians, of which there was some prospect at the outset, 

 had been escaped, and with the exception of the attacks of mountain 

 fever we had been troubled with no serious sickness. Returning to the 

 East, Mr. Chittenden had the misfortune to be taken sick, and has been 

 confined to his bed for nearly the entire winter. Upon his recovery, 

 which now seems assured, he will prepare maps of the regions we have 

 travelled over, and with them as a guide the subjoined geological report 

 will become more intelligible than it can be at present. 



