Detection is, or ought to be, an exact science, and should be treated in the same cold and unemotional manner.

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.

It is a capital mistake to theorize before one has data.

When people bury treasure nowadays they do it in the Post-Office bank.

horses: dangerous on both ends and crafty in the middle

It is stupidity rather than courage to refuse to recognize danger when it is close upon you.