In his own excellent work, "The Rough Riders," and in his sworn testimony before the Commission of Investigation of the Spanish War, Mr. Roosevelt has given us graphic pictures of how the First United States Volunteer Cavalry, commonly called the Rough Riders, happened to be organized, and what it tried to do and did, and this testimony is supplemented by many who know the facts, and who took part in the battles which made the organization famous throughout the length and breadth of our land.