With your permission I will copy your information and add it to the 3rd Texas Roster at the site below. From what I can tell only one Johnson could be in Shady Grove. The Union found a lot of bodies behind the church at Iuka that must have been from the Hospital. These bodies had been prepared for burial, but not buried. They were added to the soldiers killed at the battle on the 19th of Sep 1862 and a few who were wounded and died later.The Grave was closed about the 1st of October before the Battle of Corinth and Hatchie Bridge. Send me an e-mail if it is ok to use your data, and anything else you have. I have just updated the rosters for the 3rd with data I put together for the Shady Grove project and the roster found at the Wilson Creek Battle Field site which I had updated, but will gladly add your information.