I wonder....
Could this be their marriage?
http://interactive.ancestry.co.uk/22...l=ReturnRecord
Name: John Wilkinson
Event Date: 25 Aug 1794
Event Type: Marriage
Parish: Baildon, St John the Evangelist
Spouse's Name: Mary Hutton
Otley and Baildon are about 7 miles apart.
The occupation of Gardner seems to run in this family.