founder of W. Tyzack and Sons
1781 Baptised in Sheffield, son of John and Sarah Tyzack[1]
1803 Married Sarah Osborne[2]
1822 Thomas and William Tyzac (sic), manufacturers of saws, patent scythes, busks and doctors for calico webs, of South Street, Sheffield (Home: Sharrow Lane)[3]
1825 William went into business for himself - W. Tyzack
1841 William Tyzack 60, saw and ... smith, living in Ecclesall Bierlow, Sarah Tyzack 61, Joshua Tyzack 23, Sarah Tyzack 20[4]
1851 William Tyzack 69, saw and file manufacturer, employing 50 men, living in Ecclesall Bierlow, with his wife Sarah Tyzack 71, Mary Tyzack 39 and grandson Fredrick Tyzack 2[5]
1858 Died in Ecclesall Bierlow[6], executors were Ebenezer, William and Joshua Tyzack, manufacturers, and Benjamin Turner, manufacturer[7]