This post is shared by JF Purcell, who can be contacted at jfpurcell (at) hotmail.com. For those of you on the Thomas line, I was able to trace down the long known Cattle Mark to my 9x Grandfather Thomas Persells (Purcell). This occurred this last Wednesday [mid Jan 2019] when I visited The Brooklyn Historical Society for a seminar. The Brooklyn Historical Society houses a world-renowned special collections and archives library on the second floor of its land marked building.