"How did Cunningham happen to have a sachet bag embroidered with his initials when Cora did not know him as Cunningham?" I inquired.

"He had foolishly preserved the one she had given him as Darwin. The initials on it were P. D."

"You told me that when I learned the answers to those questions that I should know who committed the crime. Why was it then that Jones and I did not guess the truth the night we heard Lee"s story?"

"Because you had no idea of the motive for the crime. Also you answered some of the questions wrong," he replied with a smile.

"Wasn"t it odd that Ruth failed to recognize Cunningham as her husband when he spoke to her at the inquest?" I asked.

"No. He kept his voice disguised. Didn"t he say he had a bad cold or something of the sort? When I was positive that Cunningham was Darwin I had a second interview with Mrs. Darwin. She told me then that when Cunningham spoke to her she had an impression that she was hearing the voice of her husband, but as she was persuaded that Darwin was dead she thought it must be her own foolish fancy, and so said nothing about it."

I nodded, recalling the puzzled look on Ruth"s face when she glanced at Cunningham at the inquest, for which I had at the time been unable to account, and while I waited McKelvie"s return in the reception room of the Tombs, I pondered upon the kindness of Fate in having disposed of the man who had stood so long between me and the one desire of my heart.

I wondered how I would tell Ruth the actual facts in the case, and was debating the wisdom of enlightening her when McKelvie returned with a beaming smile.

"She"ll be here in just a minute," he said, adding quizzically, "You won"t need my help in solving this problem, I"ll wager," and he waved his hand toward the door.

The next moment Ruth was in my arms.