Thank you Marie for that very useful and informative reply which I'm looking forward to following up. Do you know any marriage details for Robert & Catherine by any chance? I'm interested to see if I can link these Moores to any others.
I have heard of Judith Evans from other Collister researchers, but haven't got any contact details.
Robina Catherine Collister was baptised on 1st Feb 1874 in Santon, from Glebe House, and my g grandfather Thomas Collister, one of Robina's brothers, was born on 8 June 1863. Two other brothers married into the Cavendish family of Douglas.