15th Regiment, Virginia Infantry
15th Infantry Regiment was organized in May, 1861, with men from Richmond and Henrico and Hanover counties. The regiment was brigaded under McLaws, Semmes, and Corse, Army of Northern Virginia. It fought with the army from the Seven Days' Battles to Fredericksburg, then was involved in Longstreet's Suffolk Expedition. During the Gettysburg Campaign the 15th was on detached duty and after serving in Tennessee and North Carolina participated in the battles at Drewry's Bluff and Cold Harbor. Later it took its place in the Petersburg trenches north and south of the James River and ended the war at Appomattox. This unit contained 476 effectives in April, 1862, reported 1 killed and 8 wounded at Malvern Hill, and lost fifty-nine percent of the 128 engaged at Sharpsburg. Many were captured at Sayler's Creek, and on April 9, 1865, it surrendered with 69 officers and men. The field officers were Colonel Thomas P. August; Lieutenant Colonels James R. Crenshaw, Emmett M. Morrison, Thomas G. Peyton, and St. George Tucker; and Majors C.H. Clarke and John S. Walker.

Stewart Sifakis Compendium of the Confederate Armies - Virginia - shows batlles in Yorktown Seige [April-May 1862]
Williamsburg [skirmish] [May 4, 1862]
Seven Days Battles [June 25-July 1, 1862]

Looks like they may have been in or around Richmond at the time.