One tree on Ancestry has Abraham Stone born about 1872 with a wife Leah and daughter Millie, but has no more information.
I tried making a simple purchase of the record on FindMyPast, but they wouldn't complete the purchase for some reason. I cancelled the 7 day free trial which didn't appear to be free.
Mark and Millie Kotkin are distant relatives, so I will let this challenge resolve itself in time.
Thank you everybody for your help.
Richard