Date is just a wild guess. Some time after retirement, I am sure. This is only two pages of what looks like a little essay to accompany a picture collection. Aristotle and Abelard are the first two to be pictured. The intellectual contribution of each man is described by Warfield in a half page or so of the manuscript. Perhaps there are more pages to this article somewhere, so I will scan these two pages and save.
r.w. circa 2013