Hi Beansgram,
This site may be helpful
www.seathfamily.co.uk it has OPR births for the parish of Dalgety. It contains births for children of James Hynd and Elizabeth Muir
Hynd Catherine,lawful daughter to James Hynd and Elizabeth Muir, in the colliery, was born 14th April 1821
David lawful son to James Hynd and Elizabeth Muir in the colliery was born 29th March 1823
Grizel Hynd,lawful daughter to James Hynd and Betty Muir,Colliery, was born 27th August 1825
The births are under resources.
Regards Grada