It is all in the way of professional experience. - Sherlock Holmes - Arthur Conan Doyle

for nothing clears up a case so much as stating it to another person,

"You have done all the work in this business. I get a wife out of it, Jones gets the credit, pray what remains for you?"

"For me," said Sherlock Holmes, "there still remains the cocaine-bottle." And he stretched his long white hand up for it.

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.