Hi, Thanks for your query. The Detwiler Bible is not available. The family originated from Franklin County, PA where my family originated from and there is a distinct possibility that the family is related to mine.
I do not have any information on your branch of the Dewiler family. I descend from Henry Detwiler (d 1823) Fayette County, PA through his third son, John Detwiler (1805-1884).
Look for the Detwiler group on Facebook, join it and maybe someone on there can help you.