African American soldiers watch over a bomb proof shelter
Battle of South Mountain or Boonsboro Gap
Blowing out the Bulkhead of Dutch Gap Canal
Credibility Gap
Cumberland Gap & Heights, Tennesee
Dutch Gap Canal, Howlett's Confederate Battery
Dutch Gap, Virginia. Picket station of Colored troops near Dutch Gap canal
Federal Troops at the Manassas Gap Railroad
Railroad passing thru Thoroughfare Gap Virginia
