I have a copy of "First Families of Henry County" at my home and I see in the index COWAN names, but none are Elijah. Even the Cowan names that are listed were in the county much later than 1830-40. I am not that familiar with how the county lines were drawn, but I see the district that is numbered 622 as being in the most northern tip of the count close to Dekalb County. There is a lot on Henry County, but nothing else available to me at home here. If you do not live in the Atlanta area, I can only suggest that you contact the Henry County Genealogical Society in McDonough, GA. There is a staff of volunteers who may be able to answer questions who work at the library there on Mon, Wed. & Fri (10am-3pm) The address is: The Genealogical Society of Henry & Clayton Counties, Inc. P.O. Box 1296 McDonough, GA 30253-1296 Phone # 770-954-1456 Good Luck!! Yvette Taylor Stewart Stockbridge, GA