I see what you mean. I have all the McBride books (including Wills and Administrations), but they all end by 1880 or earlier, so I guess his will isn't going to be in them either.
I can't remember - do you have the Ayres books? There is a section on the McConnaugheys that I could scan for you if you want it. I don't immediately see any references to Edward (altho I didn't look too closely), but it says the family were all abolitionists and helped conduct the Underground Railroad.