It was an impulse, yes, and not an unnatural one; yet even at the time it struck him that something more than impulse lay concealed behind it.  More than invitation, yet certainly less than command, there was a vague queer feeling that he stayed because he had to, almost as though there was something he had forgotten, overlooked, left undone.  Imaginative temperaments are often thus; and impulse is ever weakness.  For with such ill-considered opening of the doors to hasty action may come an invasion of other forces at the same time—­forces merely waiting their opportunity perhaps!

He caught the fugitive warning even while he dismissed it as absurd, and the next minute he was whirling over the smooth ice in delightful curves and loops beneath the moon.  There was no fear of collision.  He could take his own speed and space as he willed.  The shadows of the towering mountains fell across the rink, and a wind of ice came from the forests, where the snow lay ten feet deep.  The hotel lights winked and went out.  The village slept.  The high wire netting could not keep out the wonder of the winter night that grew about him like a presence.  He skated on and on, keen exhilarating pleasure in his tingling blood, and weariness all forgotten.

And then, midway in the delight of rushing movement, he saw a figure gliding behind the wire netting, watching him.  With a start that almost made him lose his balance—­for the abruptness of the new arrival was so unlooked for—­he paused and stared.  Although the light was dim he made out that it was the figure of a woman and that she was feeling her way along the netting, trying to get in.  Against the white background of the snow-field he watched her rather stealthy efforts as she passed with a silent step over the banked-up snow.  She was tall and slim and graceful; he could see that even in the dark.  And then, of course, he understood.  It was another adventurous skater like himself, stolen down unawares from hotel or chalet, and searching for the opening.  At once, making a sign and pointing with one hand, he turned swiftly and skated over to the little entrance on the other side.

But, even before he got there, there was a sound on the ice behind him and, with an exclamation of amazement he could not suppress, he turned to see her swerving up to his side across the width of the rink.  She had somehow found another way in.

Hibbert, as a rule, was punctilious, and in these free-and-easy places, perhaps, especially so.  If only for his own protection he did not seek to make advances unless some kind of introduction paved the way.  But for these two to skate together in the semi-darkness without speech, often of necessity brushing shoulders almost, was too absurd to think of.  Accordingly he raised his cap and spoke.  His actual words he seems unable to recall, nor what the girl said in reply, except that she answered him in accented English with some commonplace about doing figures at midnight on an empty rink.  Quite natural it was, and right.  She wore grey clothes of some kind, though not the customary long gloves or sweater, for indeed her hands were bare, and presently when he skated with her, he wondered with something like astonishment at their dry and icy coldness.