Hi Jackie.
James Gill, son of Jonathon and Mary of Silsden, a labourer, was baptised 3/1/1792, Silsden
Marriage - James Gill, nailmaker of silsden, bachelor, to Anne Clarkson of Silsden, spinster on the 12/3/ 1810 at Kildwick.
This marriage will help disregard the baptism I found earlier for Ann in 1801.
The son you mention, Dugdale, was baptised on the 19/1/1813 at Silsden. And another son, Jonathon, was born on the 20/12/1816 and baptised 5/1/1817.
Can I ask where you are getting your possible birth dates from? Do not rely on the 1841 census as they rounded up and down the ages and it is not reliable source.
Do you have other census years?
I can give you more children but if you have this info not much point my searching for you as there are a lot of Gills and Clarksons there.
Happy to help if required.
Margaret