(SPANISH-AMERICAN WAR). [FIRST TROOP PHILADELPHIA CITY CAVALRY]. [Monumental Annotated Photographic Record of the First City Troop of Philadelphia, Recording Their Training and Service in the Spanish-American War]. [Various places, including Pennsylvania, Virginia, at sea, New Jersey, and Puerto Rico. May to September, 1898]. pp. with 342 photographs. Four large quarto photograph albums. Matching contemporary three-quarter crimson morocco and cloth, front covers gilt. Minor shelf wear and some rubbing. Images in overall very good condition. An amazing assemblage of photographs documenting the Spanish-American War experiences of the First Troop Philadelphia City Cavalry, which was at that time the oldest volunteer military unit in continuous service to the United States. The photographs are arranged chronologically in four contemporary photo albums, with the images occasionally annotated in a contemporary hand, and including the identification of numerous members of the Troop. The first volume opens with images of Mt. Gretna, Pa., "where troops [were] sworn into U.S. service, May 7th 1898, by Maj. Thompson, U.S.A." The photographs record field exercises, camp building and tent organization at Camp Hastings, cavalry drills, an image of "Capt, Groome reading the Articles of War to Troop, June 1898," a "first arrival of government horses," several shots of men training and "throwing" their horses, shooting practice, "Capt. Groome assigning Government horses to Troopers," and various shots of the men at work and even some play. Over the course of the album, the names of numerous soldiers are recorded below several of the photographs. The second album opens with several photographs of the Troop striking their tents in preparation for leaving Camp Hastings at Mt. Gretna, headed for Camp Alger at Dunn Loring, Va. Here, the Troop was ordered to increase their enlistment numbers. At Camp Alger, the Troop was also fitted out with federal supplies and assigned to the Second Army Corps, commanded by Maj. Gen. William Graham, who is pictured here. Other photographs capture the camp scene at Alger, "the First Troop picket line," the Troop receiving their federal-issue khaki uniforms, the Troop at roll call, and some shots featuring African-American helpers. In late July, the Troop was sent to.