I am not sure where my copy of Moses Letts came from, Possibly from you. It says Generation 4 William Henry Letts b 8 May 1856 married Josephine Conklin20 Jan 1879. This seems to agree with the IGI. I used the Letts family for the DAR as my ggrandmotner was Mary E. Letts b 23 Aug 1814 and married Andrew J. Campbell m ggrandfather in 1837.
She traced back to Joshua Warne who was my patriot.