John Marshall FRS FRCS (11 September 1818 – 1 January 1891) was an English surgeon and teacher of anatomy.

[1] In 1847 Marshall was appointed assistant-surgeon at University College hospital, becoming in 1866 surgeon and professor of surgery.

[3] However, another former student, Sir John Tweedy, strongly disagreed with Schafer and described Marshall's lectures as "informative and thought-awakening" and Marshall himself as "a cultured, critical and scientific surgeon, ever ready to try new paths and explore avenues of fresh knowledge".

[4] Sir William MacCormac wrote in his volume on the Centenary of the College of Surgeons (1900): Marshall's fame, rests on the great ability with which he taught anatomy in relation to art, on the introduction into modern surgery of the galvano-cautery, and on the operation for the excision of varicose veins.

He also invented the system of circular wards for hospitals, and to him are largely owing the details of the modern medical student's education.