John Berry Haycraft

Born in 1857, John Berry Haycraft built his career as a physiologist during the late Victorian period. Reliable sources connect him with Mason College in Birmingham and later with University College, Cardiff, where he became a prominent academic figure. He died in 1922.

Haycraft is especially noted for his early study of the anticoagulant effect of leech saliva in the 1880s, work that is often cited in the history of research leading to hirudin. That places him among the scientists who helped deepen understanding of how blood clotting can be interrupted.

He also wrote for a wider readership, including books such as Darwinism and Race Progress. Today he is remembered both for his physiological research and for his role in expanding higher scientific education in Britain.