Hi MMMandy & Trees
Firstly Mandy, I am sorry but I can not find anything for you at the moment, except I can confirm that Joseph & Mary Dark(nee Pooley) did Not have a son called Joseph.
I wish you luck with you DARK research- they really are a confusing lot because of the common usage of names. After 10 years I am still trying to work out some of the relationships
I also apologise for having hijacked your posting - I have sent a PM to Trees with the info on Mary Dark.
Jo