Ellen Draper was the older sister of my umpteen times grandmother Darnity Draper.
Lavinia, John Rainbow's first wife, died at Cranfield, I have the death certificate.
I think he claimed he was a bachelor when he married Ellen - I have the marriage cert - because I have a theory that Lavinia was actually Ellen's Aunt, or otherwise related to Ellen, and they were worried they were committing an offence by marrying because of the relationship.
We need to contact each other so I can tell you lots about the Draper family.