Hello. Unfortunately I don't have a burial place for William or John. I assumed they were buried somewhere in Cleburne Co, AL, but haven't been able to confirm that.
Are you familiar with the site - findagrave.com ?
I found a brother to my David Ranse and your Thomas Henry Croy buried in Funston Cemetery in Colquitt Co, GA. The entry even has a picture of him and his wife.

I am familiar with Roy Juch's website. I have corresponded with him several times and he has done some wonderful research on the Croy and Chandler families. Very extensive. He was really helpful to me in my research.
Anything I have on William and Catherine and John and Jane Croy would have come from Roy Juch.

According to Roy, Thomas Henry Croy and his wife are buried in Yell Co, Ar. I've been wanting to go up there and look around.
Are any descendants of Thomas and his wife still living in that area?