What theme is found in the following quotes from Sir Arthur Conan Doyle?
"I know, my dear Watson, that you share my love of all that is bizarre and outside the conventions and humdrum routine of everyday life." From The Red-Headed League
"Holmes was cold and stern and silent. As the gleam of the street-lamps flashed upon his austere features, I saw that his brows were drawn down in thought and his thin lips compressed. I knew not what wild beast we were about to hunt down in the dark jungle of criminal London, but I was well assured, from the bearing of this master huntsman, that the adventure was a most grave one . . ." - The Adventure of the Empty House
??
Difficult decisions ?
Adventure ?
Friendship ?
None of the above ?