From the Richmond Examiner, 4/1/1863
DEPARTURE OF PRISONERS. – Yesterday eight hundred and fifteen Yankee prisoners took their departure Northward from the Libby for "hum." Among them was Baron Wardena, captured by Captain Mosby, who goes back as a civilian, and eleven officers – five captains and six lieutenants, under the provisions of a special exchange for an equal number of Confederate officers sent South. This morning four hundred more will go down, which deduction will leave about four hundred prisoners still remaining in Richmond, and this number daily being added to. Their transportation to City Point is in charge of Captain V. Bossieux.