Isaac married Thewlis, Martha on 1 Dec 1763 in St Peters Church, Huddersfield, , Yorkshire, England. Martha (daughter of Thewlis, Benjamin and Carter, Mary) was born about 1742 in Crimble, Golcar, , Yorkshire, England; was christened on 29 Aug 1742 in St James Church, Slaithwaite, , Yorkshire, England; died on 10 Nov 1775 in Slaithwaite, , Yorkshire, England; was buried on 13 Nov 1775 in St James Churchyard, Slaithwaite, , Yorkshire, England. [Group Sheet] [Family Chart]