Primary Source

Doyle 1897 (Online Access via archive.org):<https://archive.org/details/in.ernet.dli.2015.136463/mode/2up> (Accessed 24.09.2021).

Doyle 1924 (Online Access via archive.org):
<https://archive.org/details/memoriesadventur0000doyl/mode/2up> (Accessed 24.09.2021).

Literature 

Doyle 1897
A. C. Doyle, The Tragedy of the Korosko (London 1897).

Doyle 1924
A. C. Doyle, Memories and Adventures (London 1924).