Do you find a Captain B.G.Brown on your list of Immortal 600 and if so what may have become of him?

Thanks

Is interesting while on the subject of the Immortal 600 that many were allowed to correspond with friends and family members in the Confederacy during their ordeal.Apparently the transportation of prisoners of war mail was carried on by two Flag of Truce boats,one Federal,the other Confederate.The Federal boat plied the waters from Fort Pulaski,Hilton Head and Morris Island,meeting the Confederate boat in Charleston harbor where mail,dispatches and supplies were exchanged.
One cover in particular that has survived was from a Captain B.G.Brown a prisoner at Morris Island to a Colonel Wm.G.Brown at Brown's Cove,Albemarle County,Virginia.This cover was reported in 1961 and there may have been some few others discovered since then.

Mike