"I know that," said I.
"You know it!" he cried, looking up aghast. "How could you know it?"
"Because it was offered to me yesterday."
"Good God!" he exclaimed, "offered to you yesterday! But it could not have been, for my servant bought it in a shabby jeweler's near the Rue St. Lazarre! Look for yourself, and say what do you call that?"
He had unlocked a small safe as he spoke, and he threw a jewel case upon the table. I opened it quickly, and it was then my turn to call out as he had done a moment before. The case contained a second necklace of green diamonds exactly resembling the one I had made, and had then in my pocket; and it bore even the memorable inscription—major lex amor est nobis.
When I made this discovery there seemed something so uncanny and terrible about it that the beads of perspiration stood on my forehead, and my hand shook until I nearly dropped the case.
"Frank," I said, "there's deeper work here than you think; this is the necklace which you believe you buried with your wife; well, what is this one, then, that I have in my pocket?"
I opened the second case and laid the jewels side by side. You could not have told one bauble from the other unless you had possessed such an eye as mine, which will fidget over a sham diamond when it is yet a yard away. He had no doubt that they were identical; and when he saw them together, he began to cry like a frightened woman.
"What does it mean?" he asked. "Have they robbed my wife's grave? My God!—two necklaces alike down to the very engraving. Who has done it? Who could do such a thing with a woman who never harmed a living soul? Bernard, if I spend every shilling I possess, I will get to the bottom of this thing! Oh, my wife, my wife——"
His distress would have moved an adamantine heart, and was not a thing to cavil at. The mystery, which had completely unnerved him, had fascinated me so strangely that I determined not to leave Paris until the last line of its solution was written. The robbery of the grave I could quite understand, but that there should be two necklaces, one of them with real stones and the other with imitation, was a fact before which my imagination reeled. As for him, he continued to sit in his arm-chair, and to fret like a child; and there I left him while I went to consult the first detective I could run against.