Dedication of monument on battlefield of Bull Run, L.7362, L.7363, L.7364. Monument on battlefield of Bull Run, L.7532, S.1193, S.1194. * * * * * ARMY OF POTOMAC. AUGUST, 1861, TO MARCH, 1862. Headquarters of General McClellan at Fairfax Court House, Va., (also used by General Beauregard) L.7142, S.299. Camp of Tenth Massachusetts Infantry, S.2421. Signal tower near camp of Fourteenth New York Infantry, S.2352. Camp of Thirty-fifth New York Infantry, S.2422. Camp of Seventy-first New York Infantry, S.2413, S.2415. Camp of Thirty-first Pennsylvania Infantry, Queen's farm, near Fort Slocum, Virginia, S.2409, S.2410, S.2412. Camp scenes in camp of Thirty-first Pennsylvania Infantry, S.2405, S.2406. Review of Dwight's brigade, 8.2419, S.2420. Newspaper dealer in camp, C.1378. Sunday services in camp of Sixty-ninth New York Infantry, S.3713. Professor Lowe's balloon, S.2349, S.2350. * * * * * ARMY OF POTOMAC. MARCH, 1862, TO JULY, 1862. _Peninsula Campaign._ Battery No. 1, in front of Yorktown, L.7094, S.361, S.362, S.363, S.364, S.365. Battery No. 4, in front of Yorktown, S.373, S.374, S.375, S.376, S.377, S.378, S.379, S.380. Naval battery in front of Yorktown, S.463. Battery Magruder (confederate), Yorktown, S.2360, S.2361, S.2362. Confederate fortifications, Yorktown, S.450, S.451, S.452, S.453, S.458, S.1026, S.2364, S.2365, S.2366, S.2367, S.2368, S.2369, S.2425. Confederate fortifications, Yorktown, with exploded gun, S.455. S.2370. Ravine at Yorktown in which confederate magazines located, S.447. Confederate water battery at Gloucester Point, S.454, S.457, S.460, S.461. Yorktown Landing, S.2383. Artillery park at Yorktown Landing, S.2358. Wagon park at Yorktown Landing, S.2357. Sally-port at Yorktown, S.2371. Street view in Yorktown, S.2372. Court-house, Yorktown, S.2375, S.2376. Church, used as Second Corps hospital, Yorktown, S.2374. Baptist church and hospital of Third Division, Sixth Corps, Yorktown, S.2373. Cornwallis's headquarters during Revolutionary war, S.2336. Headquarters of General Magruder (confederate), Yorktown, Va., S.449. Cornwallis Cave, Yorktown, used by confederates for magazine, S.2379, S.2380. Captain Perkins's "Secesh," horse captured at Cornwallis Cave, Yorktown, S.2381. Confederate winter quarters near Yorktown, S.2377. Camp scene in front of Yorktown--quarters of Dr. Grant and Dr. Dwight, of French's brigade, S.2378. Farnhold's house, near Yorktown, May, 1862, S.360. Moore's house, near Yorktown, S.462. Clark's house, near Yorktown--used as hospital, S.371. House used by General La Fayette during Revolutionary war as Headquarters, S.369, S.372. Tabb's house, Yorktown, L.7413. =Camp Winfield Scott, headquarters Army of Potomac, in front of Yorktown, May, 1862:=