“That deals with the second head of the indictment, then,” she said lightly. “Now for the first. Why did you select the Engadine for your holiday?”

“If I could tell you that, I should know something of the occult impulses that govern men’s lives. One minute I was in London, meaning to go north. The next I was hurrying to buy a ticket for St. Moritz.”

“But——” She meant to continue, “you arrived here the same day as I did.” Somehow that did not sound quite the right thing to say. Her tongue tripped; but she forced herself to frame a sentence. “It is odd that you, like myself, should have hit upon an out of the way place like Maloja. The difference is that I was sent here, whereas you came of your own free will.”

“I guess you are right,” said he, laughing as though she had uttered an exquisite joke. “Yes, that is just it. I can imagine two young English swallows, meeting in Algeria in the winter, twittering explanations of the same sort.”

“I don’t feel a bit like a swallow, and I am sure I can’t twitter, and as for Algeria, a home of sunshine—well, just look at it!” She waved a hand at the darkening panorama of hills and pine woods, all etched in black lines and masses, where rocks and trees and houses broke the dead white of the snow mantle.

They happened to be crossing a bridge that spans the Orlegna before it takes its first frantic plunge towards Italy. Bower, who had quickened his pace, took the gesture as a signal, and sent an answering flourish. Helen stopped. He evidently wished to overtake them.

“More explanations,” murmured Spencer.

“But he was mistaken. I was calling Nature to witness that your simile was not justified.”

“Tell you what,” he said in a low voice, “if this storm has blown over by the morning, meet me after breakfast, and we will walk down the valley to Vicosoprano for luncheon. There is a diligence back in the afternoon. We can stroll there in three hours, and I shall have time to clear up this swallow proposition.”

“That will be delightful, if the weather improves.”