21 June 1728–1793
By 1771 Willcox had built an ironworks on Deep River where he discovered deposits of both iron ore and coal. Iron was in short supply during the Revolution, and Willcox operated one of the two ironworks in the province. His bloomery and forge supplied the area with good bar iron from which rough wrought iron utensils could be forged. In April 1776 the Fourth Provincial Congress sent a committee either to hire Willcox's ironworks or "purchase and repair" the Speedwell Works in Guilford County. Following the committee's recommendation, the Revolutionary government advanced Willcox the needed funds to complete a furnace under construction on Tick Creek about ten miles from his bloomery and forge. They also allowed him to hire enslaved laborers that had been confiscated as Loyalist property. Willcox and his brother-in-law and partner, William England, were to supply molten metal to founders employed by the state.
After various delays in getting the furnace into operation Willcox sold the ironworks to the state in February 1777 for £5,000. The state-appointed manager was no more successful than Willcox had been in keeping the furnace going. In April 1778 after months of haggling, the legislature restored Willcox's property and paid him £1,000 for damages he had sustained from public interference with his ironworks. When Willcox resumed management of the furnace, he turned out at least a few pots and possibly as much as five tons of pig iron. In June 1780 a freshet destroyed the furnace. When his accounts were settled in 1783, Willcox received £386.18s.6d. specie in payment "for sundries furnished for the use of the public."
In 1771 he married Rebecca Butler, of Philadelphia, by whom he had eight children. Willcox kept the Roman Catholic faith of his parents, and the records of St. Joseph's Church in Philadelphia indicate that at least three of their children were taken to Philadelphia for baptism. Willcox died in Richmond County.