 He lost much larger sums, however, speculating on prices of raw materials - hemp, flax, lead, logwood and alum among others.In 1771 he lost £190,000 dealing in hemp; from 1772 he was attempting to corner the world's supply of alum, buying up mines in Yorkshire and Lancashire, and saw much of the remainder of his fortune swallowed up when the market collapsed as part of a wider financial crisis.At first, Colebrooke was able to stay in business with assistance from the Bank of England, but his bank temporarily stopped payment on 31 March 1773, and permanently (after three years in the control of trustees appointed by his creditors) on 7 August 1776.