In 1742 father Nehemiah – a widower – married a widow, Martha Vandewall, the sister of
Thomas Goldney III. The
Goldney family owned land in
Warmley, and in 1746 backed by the Goldney family, William left the Bristol Brass Company and began to construct the
Warmley Works. With tools and manufacturing equipment supplied by the Darby Ironworks at
Coalbrookdale, over the next few years Warmley Works became the biggest metal processing plant in the world, with outputs of zinc, copper, brass and other metals. After the death of his father in 1747, William was joined in the business by his brother Nehemiah, and sister Rachael as a shareholder. In February 1750, William applied to the
House of Commons for some form of recompense for the losses he had suffered in making the first home produced zinc, which he hoped would allow extension of his patented process. Although a committee reported agreed that the patent should be extended through an
act of Parliament, a counter petition by the powerful lobby of the merchants of Bristol delayed the passage, and William later abandoned the legal process. However, William continued to expand the business through development at both the Warmley site, as well as new furnaces at Kingswood, a forge at Kelston near the
River Avon, and a battery mill at Bitton on the
River Boyd. By 1754, he had: His brother John Champion developed a refined process and patented in 1758 the calcination of
zinc sulfide (
zinc blende) to oxide for use in the retort process. The English zinc industry was concentrated in and around Bristol and
Swansea. ==Docks and Bristol floating harbour==