Just a quick note to let you know how much I appreciate the info from you and your mother. (I, too, have heard the Sally Flowers story, but have not been able to confirm the connection.)
It will probably be the weekend before I can give a more complete reply, but I do have a lot to share. Unfortunately, I don't have any more "singing sheriffs" information, but I will scan the picture and send it to you. Let me know how interested you are in the family genealogy. I have a reasonably well documented family tree going back to about 1800.