George Carrington Mason. The William and Mary Quarterly. Vol. 23, No. 3 (Jul., 1943), pp. 249-271
This detailed history mentions Lt. Francis Poythress, John Poythress and William Poythress in different contexts. It also mentions Rev. Devereux Jarratt, rector of Bath Parish who reportedly mentored Rev. Francis Poythress.
This article will prove very helpful for anyone interested in developing a better understanding of the early colonial period and the evolution of geographic boundaries we see referenced in land records, wills and other historical documents.
The journal article can be read online via the JSTOR portal. If you have a library membership you may be able to download the article at no charge.