Jack rose to meet his guests, and his quick ear detected the vibration of a new emotion in Houston's voice, and as they exchanged greetings, there was something in the clasp of their hands that night that thrilled the heart of each one as never before. At heart, Jack was glad of the presence of Morton Rutherford. He feared that alone with Houston, after the events of that day, and in the light of the anticipated events of the morrow, his own emotions might prove too strong, weakening the perfect self-control which he felt he must now exercise. The presence of Rutherford acted as a tonic, and restored the desired equilibrium. "Mr. Houston already knows my aversion to a lamp, and if you do not object, Mr. Rutherford, we will sit for a while in the moonlight." "By all means," said Rutherford. "I myself dislike the glare of a bright light for genuine, friendly intercourse. A soft, subdued light is much more conducive to mutual confidence and interchange of thought and feeling." "Jack, my dear friend," said Houston, after a few moments of general conversation upon indifferent subjects, an effort on Jack's part to ward off the inevitable which he felt was surely coming, "You have added very materially to our happiness to-day, in that you have helped us to a happy solution of some of the mysteries that have perplexed us, and in doing this, have brought us all into much closer relations with one another." "You refer, of course, to Lyle," Jack replied, "but while I am very glad to have contributed to your happiness, I really deserve no credit therefor. I have suspected the relationship for some time, and was only waiting for the necessary proofs, which I felt would be found in good time." "But that is not the only mystery you have solved for us, or for me," said Houston. "I think we now have a reason for the interest you have manifested in Lyle, and the kindness you have shown her; and, speaking for myself, I believe I have found a clue to the strange bond of mutual sympathy which has united us almost from our first meeting, even before we had exchanged one word; notwithstanding the coldness and reserve of your manner, I felt that back of it all you were my friend, and so it has proved. There has sprung up between us an affection which I believe to be mutual, and of a depth and power remarkable for such a brief acquaintance. But to-night there seems, to my mind, to be a reason for this, which I have been so blind as never to suspect." "And what may that reason be?" inquired Jack, calmly. "You will understand of course, my dear friend, as I have often said to you, I have no wish to question you regarding your life in the past, or to lead you to make any statements regarding yourself which you would not make freely and voluntarily; but to me it is evident that, although we met as strangers, you must sometime have been at least a trusted friend of the members of my uncle's family, if not more intimately connected with them."