How clear is the surname DICKEY? Perhaps there is another spelling?
Point Lookout POW camp became operational in September 1863. The surplus POWs at Fort Delaware and elsewhere were transferred and thereafter, it became a primary destination for many Confederate prisoners captured in the east. It was also used as a collection depot (a place to collect POWs from other prisons prior to delivery) for the "humanitarian exchanges" that took place in late 1864 and early 1865
Hugh Simmons
Fort Delaware Society
www.fortdelaware.org