Hi Carole, thanks for answering
On the Gray side I have census returns showing William Gray born about 1794 in Rotherham, Tabitha born about 1801 in Great ?. No details of marriage but I have them as a couple at the baptism of son Sidney Gray (ancestor), 25th January 1824, North Wheatley, Notts, also at several other baptisms in the Lincolnshire area.
On Mobbs side I have no census returns, but James Mobbs and Bethania are a couple at the baptism of son Moses Mobbs (ancestor) on 5th April 1840 at Corringham, Lincolnshire, and James is down as father when Moses married Silva Smith on 7th July 1862 Springthorpe, Lincolnshire. Understand that James and Bethania had children from about 1820, which would put their births round about 1800.
Can't remember where I got the information that Tabitha and Bethania were sisters, it was mentioned in a forum, I made a note but didn't list where the info came from.
Schiehallion