APPENDIX C 371 



gest affluent of the Madeira, Until now its upper course has been ut- 

 terly unknown to every one, and its lower course although known for 

 years to the rubber men utterly unknown to all cartographers. Its 

 source is between the 12th. and 13th. parallels of latitude south, and 

 between longitude 59 degrees and longitude 60 degrees west from Green- 

 wich. We embarked on it about at latitude 12 degrees i minute south 

 and longitude 60 degrees 18 west. After that its entire course was 

 between the 60th. and 6ist. degrees of longitude approaching the latter 

 most closely about in latitude 8 degrees 15 minutes. The first rapids 

 were at Navaite in 11 degrees 44 minutes and after that they were 

 continuous and very difficult and dangerous until the rapids named 

 after the murdered sergeant Paishon in 11 degrees 12 minutes. At 11 

 degrees 23 minutes the river received the Rio Kermit from the left. At 

 II degrees 22 minutes the Marciano Avila entered it from the right. At 

 II degrees 18 minutes the Taunay entered from the left. At 10 degrees 

 58 minutes the Cardozo entered from the right. At 10 degrees 24 

 minutes we encountered the first rubber man. The Rio Branco entered 

 from the left at 9 degrees 38 minutes. We camped at 8 degrees 49 

 minutes or approximately the boundary line between Matto Grosso and 

 Amazonas. The confluence with the upper Aripuanan, which entered 

 from the right, was in 7 degrees 34 minutes. The mouth where it en- 

 tered the Madeira was in about 5 degrees 30 minutes. The stream we 

 have followed down is that which rises farthest away from the mouth 

 and its general course is almost due north. 



My dear Sir, I thank you from my heart for the chance to take 

 part in this great work of exploration. 



With high regard and respect, believe me 



Very sincerely yours, 



Theodore Roosevelt. 



