Sir John Charles Sigismund Day, Q. C., was a collector. He was called to the bar in 1849. He became a Q. C. in 1882 and later a Justice of the Queen's Bench Division of the High Court.
Foster, Joseph, Men at the Bar: a biographical hand-list of the members of the various inns of court, including Her Majesty's judges, London, 1885; Who's Who, 1898, London 1898; Who Was Who: a companion to Who's Who, vol. 1, 1897/1915, London, 1920-21.