"'How often have I said to you that when you have eliminated the impossible, whatever remains, however improbable, must be the truth?"

"It is my belief, Watson, founded upon my experience, that the lowest and vilest alleys in London do not present a more dreadful record of sin than does the smiling and beautiful countryside."

"The case has, in some respects, been not entirely devoid of interest."

"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."

"There was something awesome in the thought of the solitary mortal standing by the open window and summoning in from the gloom outside the spirits of the nether world."

"I think as a result of my own personal experiences, that the accusations of fraud against mediums have been much exaggerated."

"He was a genius - that is to say, a man who does superlatively and without obvious effort something that most people cannot do by the uttermost exertion of their abilities."

"There is no great genius without some touch of madness."

"The public is wonderfully tolerant. It forgives everything except genius."

"Genius may have its limitations, but stupidity is not thus handicapped."

"Genius might be described as a supreme capacity for getting its possessors into trouble of all kinds."

"Genius is of no country."