SERVICE.--Duty at Baltimore, Md., until November 4, 1861. At Relay House until November 27, and at Baltimore until February 27, 1862. Guard duty by detachments along Baltimore &amp; Ohio Railroad between Martinsburg and Charleston, W. Va., until May. Company "D" at Harper's Ferry until May 24, then moved to Winchester. Company "F" at Harper's Ferry until May 9, then moved to Winchester. Company "H" at Duffield's until May 24, then moved to Winchester. Company "K" at Kearneysville until May 24, then moved to Winchester. Company "C" at Van Obeiseville until May 9, then moved to Winchester. Company "A" at Opequan Bridge until May 24, then moved to Winchester. Company "B" at Martinsburg until May 24, then moved to Winchester. Company "E" at Halltown until May 9, then moved to Winchester. Companies "G" and "I" at Charleston until May 9, then moved to Winchester. All Companies at their stations from March 28. Operations in Shenandoah Valley May 15-June 17. Middletown May 24. Winchester May 25. Retreat to Williamsport May 25–27. Reconnaissance toward Martinsburg May 28. Reconnaissance to Luray C. H. June 29–30. Battle of Cedar Mountain August 9. Pope's Campaign in Northern Virginia August 16-September 2. Guarding trains during Second Bull Run battle. Battle of Antietam, Md., September 16–17. Duty at Berlin, Md. (now Brunswick), October 3-December 10. March to Fairfax Station December 10–14, and duty there until January 19, 1863. March to Stafford C. H. January 19–23, and duty there until April 27. Ordered to rear for muster out April 27.