Ps no I haven't seen this birth certificate, but, strangely, she had a daughter, Dinah, born on the 30th December 1868 in Durham.
This child was given the Walton surname as opposed Cantes - I haven't seen that birth certificate either, but odd how Barbara gave her son the Cantes surname, Dinah, was named Walton, and yet a third child was given the Cantes surname again.
Sue