Name, date of birth, date of marriage, from the “Barlow Tree” received from Julie Bourke in email dated 27 May 2017. Julie is the great-great-granddaughter of Emma Frances Devis.

According to:
https://eastendlivesblog.wordpress.com/2017/01/15/...thers-come-to-london/
Year of death, “must have been some time between the birth of her son James Blanch junior in 1784, and James senior’s marriage to Sophia in 1792”.
Brian of nzolivers.com has listed circa 1788 to represent this.