Luckily I decided to look through roostweb and found your query from last month. Cenobia was my great grandmother from her first(?)marriage to Jaun? Zazueta I believe. My grandfather was Rudolph John Sinclair, Edwards Sinclairs older half brother.
Anyway I talked with I think the eldest son of Edward Sinclair several years ago on the phone. I don't remember his first name and suspect he may have passed away by now. Was his first name Ken or Kim? Didn't Edward Sinclair have three sons? He told me that Edward Sinclair Sr. had moved away to Columbia in South America and mentioned a few other things about Edward and his sister Della.
Please email me at firstname.lastname@example.org
to compare notes.