Arthur Conan Doyle — "The Irish are a difficult people, but they have their charm."

"It is a truism that the surest way to conceal a fact is to make it appear ridiculous."

"The public is an excellent detective in its way."

"The world is full of obvious things which nobody by any chance ever observes."

"It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts."

"A man should keep his little brain attic stocked with all the furniture that he is likely to use, and the rest he can put away in the lumber-room of his library, where he can get it if he wants it."