"It is so great a mystery to me," he answered, "that I scarcely dare to draw any conclusion whatever; but in the obscurity I think I can grope my way to two suppositions, which to me seem almost certainties."
"And they are—"
"First, that George Talboys never went beyond Southampton. Second, that he never went to Southampton at all."
"But you traced him there. His father-in-law had seen him."
"I have reason to doubt his father-in-law's integrity."
"Good gracious me!" cried my lady, piteously. "What do you mean by all this?"
"Lady Audley," answered the young man, gravely, "I have never practiced as a barrister. I have enrolled myself in the ranks of a profession, the members of which hold solemn responsibilities and have sacred duties to perform; and I have shrunk from those responsibilities and duties, as I have from all the fatigues of this troublesome life. But we are sometimes forced into the very position we have most avoided, and I have found myself lately compelled to think of these things. Lady Audley, did you ever study the theory of circumstantial evidence?"
"How can you ask a poor little woman about such horrid things?" exclaimed my lady.
"Circumstantial evidence," continued the young man, as if he scarcely heard Lady Audley's interruption—"that wonderful fabric which is built out of straws collected at every point of the compass, and which is yet strong enough to hang a man. Upon what infinitesimal trifles may sometimes hang the whole secret of some wicked mystery, inexplicable heretofore to the wisest upon the earth! A scrap of paper, a shred of some torn garment, the button off a coat, a word dropped incautiously from the overcautious lips of guilt, the fragment of a letter, the shutting or opening of a door, a shadow on a window-blind, the accuracy of a moment tested by one of Benson's watches—a thousand circumstances so slight as to be forgotten by the criminal, but links of iron in the wonderful chain forged by the science of the detective officer; and lo! the gallows is built up; the solemn bell tolls through the dismal gray of the early morning, the drop creaks under the guilty feet, and the penalty of crime is paid."
Faint shadows of green and crimson fell upon my lady's face from the painted escutcheons in the mullioned window by which she sat; but every trace of the natural color of that face had faded out, leaving it a ghastly ashen gray.