“There’s some consolation in that,” she replied, leading the way back toward the middle of the course; “if we see another, don’t be so abrupt with him.”

The stream now broadened to nearly three times its ordinary extent, so that it looked as if they were gliding over the bosom of some lake lagoon instead of a small river.  At the widest portion, and from the furthest point on the right, twinkled a second light, so far back among the trees that the structure from whence it came was out of sight.  They gave it little attention and kept on.

Sterry took out his watch.  The moonlight was so strong that he saw the figures plainly.  It lacked a few minutes of nine.

“And yonder is the mouth of Wild Man’s Creek,” said Fred; “we have made pretty good speed.”

“Nothing to boast of,” replied Jennie; “if it were not for fear of distressing mother, I would insist that we go ten or fifteen miles further before turning back.”

Since plenty of time was at command, they continued their easy pace, passing over several long and comparatively straight stretches of frozen water, around sharp bends, beyond another expansion of the stream, in front of a couple of natural openings, and finally, while it lacked considerable of ten o’clock, they rounded to in front of a mass of gray towering rocks on the right bank of the stream, and, skating close into shore, sat down on a bowlder which obtruded several feet above the ice.

They were at the extremity of their excursion.  These collective rocks bore the name of Wolf Glen, the legend being that at some time in the past a horde of wolves made their headquarters there, and, when the winters were unusually severe, held the surrounding country in what might be called a reign of terror.  They had not yet wholly disappeared, but little fear of them was felt.

The friends could not be called tired, though, after skating fifteen miles, the rest on the stone was grateful.

They sat for half an hour chatting, laughing, and as merry as when they started from home.  The sky was still unclouded, but the moon had passed beyond the zenith.  A wall of shadow was thrown out from one of the banks, except for occasional short distances, where the course of the stream was directly toward or from the orb.

When Sterry again glanced at his watch it was a few minutes past ten.  They had rested longer than any one suspected.

“Mother won’t look for us before midnight,” remarked Fred, “and we can easily make it in that time.”

“She was so anxious,” said the sister, who, despite her light-heartedness, was more thoughtful than her brother, “that I would like to please her by getting back sooner than she expects.”

“We have only to keep up this pace to do it,” said Monteith, “for we have been resting fully a half hour—­”

He paused abruptly.  From some point in the wintry wilderness came a dismal, resounding wail, apparently a mile distant.