THE DESCENT OF MAN
idea seemed to be sitting opposite him, and their eyes met every moment or two in a glance of joyous complicity; yet when a friend of the family presently joined him and began to talk about college matters, the idea slipped out of sight in a flash, and the Professor would have had no difficulty in proving that he was alone.
But if, from the outset, he found his idea the most agreeable of fellow-travellers, it was only in the aromatic solitude of the woods that he tasted the full savour of his adventure. There, during the long cool August days, lying full length on the pine-needles and gazing up into the sky, he would meet the eyes of his companion bending over him like a nearer heaven. And what eyes they were!—clear yet unfathomable, bubbling with inexhaustible laughter, yet drawing their freshness and sparkle from the central depths of thought! To a man who for twenty years had faced an eye reflecting the commonplace with perfect accuracy, these escapes into the inscrutable had always been peculiarly inviting; but hitherto the Professor's mental infidelities had been restricted by an unbroken and relentless domesticity. Now, for the first time since his marriage, chance had given him six weeks to himself, and he was coming home with his lungs full of liberty.
It must not be inferred that the Professor's do-
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