His agents in London and Essex bought cheese and butter for delivery by sea to London. With a few other tradesmen he cornered the market and this de facto cartel was able to sell at an inflated price that fomented butter riots in London in the 1590s.
A group of traders in London and Essex dominated the dairy market, using their agents to purchase cheese and butter for oceanic transport to London. In collaboration with a few other merchants, they created a de facto monopoly that enabled them to charge exorbitant prices, resulting in butter-related disturbances in London during the 1590s.