|FamilySearch screen shot of Thomas McCool marriage record|
A quick Google search finds another researchers family tree that has Martha SCALES as the wife of Thomas' son, John B. McCool, marrying in 1823 in Warrick County, Indiana. However, this person has John B. as the son of William McCOOL.
Obviously, I have several McCOOLs to sort out and errors in my database. I've made an assumption that the John P. McCOOL listed in the will abstract was Thomas's son and the same as John B. Assumptions are dangerous in genealogy, and I should wait until I receive verification.