a corn merchant, also known as a political economist and writer. He was a leading amateur British chess master. He was educated in the Roman Catholic college at Penn, Buckinghamshire, and continued his studies long after leaving the institution. He entered commercial life at an early age, and was the owner of the first screw steamers to the Levant. In 1859, he became a member of the firm of H. J. Johnston & Co., and when it was broken up in 1864 he began as a cornbroker on his own account. In 1862, he purchased Heatherside, Surrey. In 1859 Mongredien played a chess match against Paul Morphy. After drawing the first game, he lost the next seven on the trot, losing the match 7.5-0.5.
