Depend upon it there comes a time when for every addition of knowledge you forget something that you knew before. It is of the highest importance, therefore, not to have useless facts elbowing out the useful ones.

It is quite a three pipe problem, and I beg that you won't speak to me for fifty minutes.

Like all Holmes' reasoning, the thing seemed simplicity itself when it was once explained. Dr. Watson, speaking of Sherlock Holmes.

The lowest and vilest alleys of London do not present a more dreadful record of sin than does the smiling and beautiful countryside.

Violence does, in truth, recoil upon the violent, and the schemer falls into the pit which he digs for another.

It is, I admit, mere imagination; but how often is imagination the mother of truth?

Nothing clears up a case so much as stating it to another person.