A notebook used by Sir Arthur Conan Doyle while a medical student, which contains the second story he sold for publication, has gone on display.
The notebook is described as "a piece of history"
The book was used by the Sherlock Holmes creator at the Edinburgh Royal Infirmary in 1879.
It contains case histories of patients and the American's Story handwritten at the back.
The book is part of a display in the Royal College of Surgeons of Edinburgh Hall museum.
The RCSE bought the item at auction last month.
Royal College president John Smith said the book was causing a great deal of excitement.
He said: "This is a great piece of history and we felt that it was important that steps were taken to keep the notebook in the public domain, allowing access by scholars, researchers and the general public.
"It is recognised that the inspiration for Sherlock Holmes came from his time working with the Edinburgh surgeon and fellow/president of the Royal College of
Surgeons of Edinburgh, Joseph Bell."