Where did you obtain this intelligence?

I'm trying to ID the vessel involved in this shipment:

McCamish, Samuel, Pvt., Co. I, 43rd Tennessee, captured in hospital and paroled at Vicksburg July 4-15, 1863, shipped with paroled sick and wounded prisoners from Vicksburg July 24, 1863 to Mobile, Ala. via New Orleans, La.

George Martin
ggmartin55@att.net