Prescription to Hay Doyle (2 march 1904)
From The Arthur Conan Doyle Encyclopedia

This prescription was written by Arthur Conan Doyle on 2 march 1904 from Sheringham, Norfolk to his brother John Francis Innes Hay Doyle.
This was 13 years after he had given up his medical career.
Prescription
Captain Hay Doyle R.A.
Rq
Alun 3 p. ag ad 3 VIII
Sig
The Gargle
To be made 3 times a day.
Arthur Conan Doyle M.D.