Robert Barr,
The Triumphs of Eugène Valmont…
(1906)
“ I know the idea is prevalent that a detective arrives at his solutions in a dramatic way through following clews invisible to the ordinary man. This doubtless frequently happens, but, as a general thing, the patience and hard work which Mr. Edison commends is a much safer guide. Very often the following of excellent clews had led me to disaster, as was the case with my unfortunate attempt to solve the mystery of the five hundred diamonds.As I was saying, I never think of the late Lord Chizelrigg without remembering Mr. Edison at the same time, and yet the two were very dissimilar. ”
