a line of a letter. It was a difficult condition. While there are chemicals which are frequently resorted to for testing the authenticity of disputed decuments such as wills and deeds, their use frequently injures or destroys the paper under test. So far as I could determine, the document also defied the microscope.
"But ultraviolet photography does not affect the document tested in any way, and it has lately been used practically in detecting forgeries. I have photographed the last page of the will with its signatures, and here it is. What the eye itself can not see, the invisible light reveals."
He was holding the document and the copy, just an instant, as if considering how to announce with best effect what he had discovered.
"In order to unravel this mystery," he resumed, looking up and facing the Elmores, Kilgore, and Hollins squarely, "I decided to find out whether any one had had access to that closet where the will was hidden. It was long ago, and there seemed to be little that I could do. I knew it was useless to look for finger-prints.
"So I used what we detectives now call the law of suggestion. I questioned closely one who was in touch with all those who might have had such access. I hinted broadly at seeking finger-prints which might lead to the identity of one who had entered the house unknown to the Godwins, and placed a document where private detectives would subsequently find it under suspicious circumstances.
"Naturally, it would seem to one who was guilty of such an act, or knew of it, that there might, after
