Everyone is a potential murderer-in everyone there arises from time to time thewish to kill-though not the will to kill.

You should employ your little grey cells.

If one sticks too rigidly to one's principles, one would hardly see anybody.

I suppose without curiosity a man would be a tortoise. Very comfortable life, a tortoise has.

Never do anything yourself that others can do for you.

I specialize in murders of quiet, domestic interest.

There is no detective in England equal to a spinster lady of uncertain age with plenty of time on her hands.