George, I found this while searching for info on the Falling Waters, Maryland Battle during the retreat from Gettysburg. This is a report by then Colonel Thomas J. Jackson of the 1st Virginia Volunteers. The report was made on an engagement fought about 2 weeks before 1st Bull Run at Falling Waters, (now West) Virginia. It's also referred to as Hoke's Run, or Hainesville. Here's a link to the 2nd page of the report in the OR.

http://ehistory.osu.edu/books/official-records/002/0186

A paragraph from this page reads :

Colonel Stuart reports his capture of an entire company (the Fifteenth Pennsylvania Volunteers), with the exception of the captain. Three, resisting, were killed. He further reports that "one of the enemy was killed by a negro of Captain Carter's and one of Captain Patrick's company." The following is his list of prisoners: Forty-three privates, Fifteenth Pennsylvania Volunteers; one second lieutenant, one surgeon, one (position not know), but all of the Fifteenth Pennsylvania Volunteers; one private First Wisconsin Volunteers; two privates Second U. S. Cavalry, mounted and equipped; making a total of forty-nine. He reports one wounded and two missing. The enemy, he states, entered Martinsburg at 12 n. to-day.

Captain R.W. Carter of Company H.

Captain William Patrick of Company E

This was posted by an obvious disciple of the distinguished Mr. Levin, noting these men were certainly slaves and not enlisted Confederate soldiers, while ignoring the fact that whatever the case, they were apparently armed.