I searched for Capt. Isaac Heysinger on Google and found the following. It's the very first one!
Verbatim - Volume 9, Issue 1 ... on caissons, in ambulances, with the staff of generals and promiscuously mixed up with all the Rebel horde. Capt. Isaac Heysinger. ... www.credenda.org/issues/9-1verbatim.php - 16k - Cached - Similar pages
That is the sourse I posted. Now where they got it,,I have no idea.
FRee dixie,sw