Summary

Portrait of Robert Barr 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.
Source: Wikisource

Portrait of Robert Barr Robert Barr The Triumphs of Eugène Valmont… (1906)

He lived like any laborer, occupying himself sometimes as a carpenter, sometimes as a blacksmith; indeed, he made a blacksmith's shop of the library, one of the most noble rooms in Britain, containing thousands of valuable books which again and again he applied for permission to sell, but this privilege was never granted to him. I find on coming into the property that my uncle quite persistently evaded the law, and depleted this superb collection, book by book, surreptitiously through dealers in London.
Source: Wikisource

Portrait of Robert Barr Robert Barr The Triumphs of Eugène Valmont… (1906)

We knew what we wanted; a carbonized tissue, which would withstand the electric current in a vacuum for, say, a thousand hours. If no such tissue existed, then the incandescent light, as we know it, was not possible. My assistants started out to find this tissue, and we simply carbonized everything we could lay our hands on, and ran the current through it in a vacuum. At last we struck the right thing, as we were bound to do if we kept on long enough, and if the thing existed. Patience and hard work will overcome any obstacle.'
This belief has been of great assistance to me in my profession.
Source: Wikisource

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