Corker was young when his father died, and his uncle, John Newman, a local attorney, apprenticed him to a merchant in Falmouth.
[1] His brother, Thomas Corker was apprenticed to the Royal Africa Company and was assigned to the post of Chief Agent for their York Island factory.
He was dismissed from the receivership by Robert Harley in 1712 and was re-instated in 1720 at the time when he procured a patent for a whale-fishery off the coasts of Cornwall.
[2] Corker's first wife died in January 1726 and he married secondly Mary Rouchliffe of St. Clement Danes on 28 November 1726.
His estates were sold after his death for the benefit of Frederick, Prince of Wales, to whom as Duke of Cornwall, he owed £23,000 for arrears since June 1727.