Cardiotype

Source / Recreative Science
Title / Mike Ware

No case is one-half so difficult of belief as that alleged marvellous discovery by Dr. Conyers, who, it is said, on anatomising a gentleman who died for love, found an impression of the lady’s face upon his heart.

P.S. Yes, this is a joke:-)

Mike Ware is a british chemist and inventor of the New Cyanotype process – amongst others and an author of many books.

Source: Recreative Science: a record and remembrancer of intellectual observation (Vols 1 and 2, Groombridge and Sons, London 1860/1) In which C.M.Archer contributed articles on an ‘Anecdote History of Photography’