He worked at St Thomas's Hospital where he was a demonstrator of anatomy and surgical registrar.
Croft was one of the earliest hospital surgeons in London to adopt Listerian methods. His name is chiefly associated with the introduction of ‘Croft's splints’, which were plaster of Paris cases made with scrubbing flannel and shaped to the limb.
(Source Jeffrey S. Reznick)
Image above: Royal College of Surgeons- Council
(Left to right: John Whitaker Hulke, Thomas Bryant, William Cadge, Arthur Edward Durham, Henry Power, George Lawson, Edward Lund, Thomas Spencer Wells, James Paget, John Croft, William Scovell Savory (Vice President), William MacCormac, John Cooper Forster (President), Edward Trimmer (Secretary), Timothy Holmes (Vice-President), Christopher Heath, Matthew Berkeley Hill, John Eric Erichsen, William Allingham, Thomas Smith, Sydney Jones, John Marshall, Joseph Lister, John Wood, Frederic Greville Hallett (Assistant Secretary), Jonathan Hutchinson)