More notoriety is showing up for Sir Thomas Leigh, and I stopped working through the list of added sources on one that names Roger and gave the Dugdale citation, until I can carefully document that.
I plan to come back to work on Roger and son, once I see what more, if anything, Dugdale might tell us. Fingers-crossed that Roger's origins might also be mentioned.
Meanwhile, I ran across two collateral men of the same name among close ancestors in a direct Autry line, mostly unrelated to Leigh, so I have been working to at least good stopping points, and dividing time between these laborious tasks.
Eventually, I'll check the topmost person that shows up for this Leigh line, and see if that scares up a source or additional lead, too...