Well, I'm a bacteriologist, you know. I live in a nine-hundred-diameter microscope. I can hardly claim to take serious notice of anything that I can see with my naked eye.

Too much! Wait till you have lived here longer. Look down the valley! See the cloud of a hundred chimneys that overshadows it! I tell you that the cloud of murder hangs thicker and lower than that over the heads of the people. It is the Valley of Fear, the Valley of Death. The terror is in the hearts of the people from the dusk to the dawn. Wait, young man, and you will learn for yourself.

A little monograph on the ashes of one hundred and forty different varieties of pipe, cigar, and cigarette tobacco.

Skill is fine, and genius is splendid, but the right contacts are more valuable than either.

I never make exceptions. An exception disproves the rule.

You have probably never heard of Professor Moriarty? said he.