I haven't been on Ancestry for about a month and just found your message. My husband's grandfather was Frederick Fall; son of James Fall & Fanny Sheens. I know from the censuses that Fanny had two aunts who made hats. Other than that I know very little about the Sheens. When Fanny died she was still called Sheens but the censuses refer to her as Fanny Fall.
The mystery around Matthew Fall and James fall remains just that, a mystery. Because Matthew was born before birth certificates I have no way of knowing if he was given a middle name (possibly James). I have found no death of Matthew and he disappeared off the censuses; at that time James appeared. I will see if I have any info on the Sheens family. Meanwhile I would love it if you could give the info you have on the Sheens