“There is a soul-jealousy that can be as frantic as any body-jealousy.”

“Jealousy is a strange transformer of characters.”

“He said that there were no traces upon the ground round the body. He did not observe any. but I did - some little distance off, but fresh and clear""Footprints?"

“There are strange red depths in the soul of the most commonplace man.”

“Some people's affability is more deadly than the violence of coarser souls.”

“It is a mistake to confound strangeness with mystery. The most commonplace crime is often the most mysterious because it presents no new or special features from which deductions may be drawn. This murder would have been infinitely more difficult to unravel had the body of the victim been simply found lying in the roadway without any of those outré and sensational accompaniments which have rendered it remarkable. These strange details, far from making the case more difficult, have really had the effect of making it less so.”

“Have you tried to drive a harpoon through a body? No? Tut, tut, my dear sir, you must really pay attention to these details.”