"I must confess that I am stupid enough not to see what you are driving at, in spite of your lucid reasoning," replied Lena.

"Why, this, that Major Carrington, of Madras, and Squire Carrington, of the Manse, Northden, are not merely namesakes, but one and the same person!"

"Good gracious me!" exclaimed Lena. "You clever boy! And you mean to say that the Squire is an army man, and yet not even his son knows it?"

"That is so, according to reasoning in which I can see no flaw, at present. I asked him just now whether he had ever been in India, and, if so, whether he had met a certain Major Carrington at Madras."

"Yes, and what did he say?"

"He could not answer. He was plainly terrified by the question, and without further parley dismissed me on the ground that I was tiring him by conversation. No; of this I am confident, there's something very deep and mysterious about the whole business. One thing has been bothering me a good deal. Were we right in making that promise to Doctor Meadows? Is he really unconnected with our mystery, as he would try to make out? Does it not seem most improbable that there should be two men with closely guarded secrets occupying houses adjoining one another in a peaceful little country village? Yet there was something so sincere about the way in which he spoke that one could not help believing him. Now, in the recent conversation I had with my father, he told me that the only person who ever knew anything about his secret (except, of course, the creature who is responsible for the attempt on his life) is dead. Yet Meadows claims a knowledge of that secret. One of the two is not adhering to the truth. Naturally, I am inclined to think that Meadows is this one, though I confess it appears possible that my father might not be too careful about speaking the whole truth if he feared by so doing to place in my hand a clue to the revelation of his secret. But, supposing that Meadows' knowledge of my father is not of such a kind as he would lead us to believe it to be, have we not, perhaps, acted unwisely in confiding in him to so great an extent? And the discovery that the servant's real name is Horncastle; what do you make of that?"

"I feel very much inclined," replied Lena, "to think that he is what Kingsford calls 'the' Horncastle, the man who was sent to prison for daring robbery about a year ago, and who escaped from Dartmoor six or eight months since. Oh, to think that you were in the clutches of such a creature, Laurence, and that you were practically alone with him in that dark house! Why, didn't they say that he was suspected of some murder out at Swiss Cottage? Yes, I'm sure they did. But what can he be doing in Durley Dene? Is he in hiding there? If so, perhaps that is the secret of the house. But it cannot be. There is something far deeper than that in the mystery of Durley Dene."

"I can easily prove that that is but a part of the mystery," said Laurence. "You remember how Horncastle said to me when I threatened to report him, 'Do you think I care whether you tell the doctor? He's nothing to me.' Well, to my mind, that remark implies that, instead of fearing his master (if he is actually such), he has the whip hand of Meadows. Why? Because he alone knows the doctor's mysterious secret. He realises, of course, that the master of Durley Dene dares not expose him or hand him over to justice as an escaped convict for fear that Horncastle, in his turn, will reveal to the world his secret, which, according to Meadows himself, would electrify the world and prove one of the greatest sensations of the day. Thus we now know why Horncastle wears a woman's disguise when walking abroad, because, were he not to do so, he might be identified by anyone who had seen his portrait, copies of which were posted outside every police-station in the kingdom, with a notice to the effect that anyone apprehending Thomas Horncastle or giving such evidence as shall lead to his apprehension will be amply rewarded!"

"Really, Laurence," said his companion gaily, "you're quite smart. We are, I am certain, at any rate well started in our investigation of this maze of mysteries. But what have we here?"

The last remark was caused by the fluttering of a scrap of white paper, on which Lena's eye chanced as the young pair strolled down a path bounded on one side by the palisade dividing the garden from that of Durley Dene.