Thomas Cuthbert Day
Thomas Cuthbert Day FRSE EGS FCS (1852–1935) was a British chemist, photo-engraver and geologist. He was the joint founder of the firm Hislop & Day who made major advances in the reproduction of photographs in printed books. Day also independently published books showing their skills in printing photographs in books, utilising his own photographs and text, and usually published under T. C. Day.