In 1880, Jane Francisco, widow of William Francisco is living with George W. Brown and family.She is listed as 1/2 sister (presumedly to George as he is head of household.) This means that Jane is the daughter of Bethany and Benjamin Briggs.Jane was born about 1795, so your information about Jane or June born 29 July 1795 fits for her.
I've been searching for years, trying to figure out just who Jane was and how she was connected to George and Bethany.Even though it took until now for me to find it, I am very thankful to you for sharing this info.
I am related through Peter Terpening who married Hannah Francisco.Peter is Maria's (m. George W. Brown) brother.I believe William and Jane (Briggs) Francisco to be the parents of Hannah (Francisco) Terpening, Harriet M. who married Stephen Presson and Solomon who married Louisa Pine. All married in Warren Co., IL.There is one other female Francisco sibling I have yet to find.