Organized at Philadelphia and mustered in April 25, 1861. Designated 17th May 15, 1861. Moved to Perryville, thence to Baltimore, Md., May 8, and to Washington, D. C., May 10. Camp on Kalorama Heights till June 10. Attached to Stone's Command, Rockville Expedition, June 10-July 1. Edward's Ferry June 18. Join Patterson at Martinsburg, Va., July 7. Attached to 7th Brigade, 3rd Division, Patterson's Army. Advance on Bunker Hill July 15. March to Charleston July 17, thence to Harper's Ferry July 21. Moved to Philadelphia and mustered out August 2, 1861.