Searched: All sorts of stuff. I've looked for anything about Mark Twain's religion, and read some articles on Tom Sawyer. I have googled variations of "Protestant evening prayers," "evening prayers," "children's prayers," etc. I found some information about Calvinism, which appears to be the most likely branch of Protestantism that they practice. All my personal knowledge of religion is Catholic, and therefore not very useful.
What prayers would Tom Sawyer say before bed? Would Protestant children at that time have had a specific prayer to say, or would it have been more improvised?
Thanks for any help.
Edit: Looks like I'll be going with "Now I Lay Me Down To Sleep" or something improvised...thank you all for your help.