You are so lucky to have been able to talk to someone who remembers so much about the Dettmers. Rosina and Heloise's father was George Thomas I have copy of his death cert and his will. He left one hundred pounds, alot of money in 1843. On Heloise's marriage cert 1851 his occupation was shown as pianoforte maker. What was Rose's daughter's name, how many children did she have?