When I reached the dining-room I found everyone complaining of the cold, and learned that the school's heating-plant was temporarily out of order. Being especially sensitive to low temperatures, I was myself an acute sufferer; and at once decided not to brave any freezing schoolroom that day. Accordingly I invited my class to come over to my living-room for an informal session around my grate-fire—a suggestion which the boys received enthusiastically.
After the session one of the boys, Robert Grandison, asked if he might remain; since he had no appointment for the second morning period. I told him to stay, and welcome. He sat down to study in front of the fireplace in a comfortable chair.
It was not long, however, before Robert moved to another chair somewhat farther away from the freshly replenished blaze, this change bringing him directly opposite the old mirror. From my own chair in another part of the room I noticed how fixedly he began to look at the dim, cloudy glass, and, wondering what so greatly interested him, was reminded of my own experience earlier that morning. As time passed he continued to gaze, a slight frown knitting his brows.
At last I quietly asked him what had attracted his attention. Slowly, and still wearing the puzzled frown, he looked over and replied rather cautiously:
"It's the corrugations in the glass—or whatever they are, Mr. Canevin. I was noticing how they all seem to run from a certain point. Look—I'll show you what I mean."
The boy jumped up, went over to the mirror, and placed his finger on a point near its lower left-hand corner.
"It's right here, sir," he explained, turning to look toward me and keeping his finger on the chosen spot.
His muscular action in turning may have pressed his finger against the glass. Suddenly he withdrew his hand as though with some slight effort, and with a faintly muttered "Ouch." Then he looked back at the glass in obvious mystification.
"What happened?" I asked, rising and approaching.
"Why—it—" He seemed embarrassed. "It—I—felt—well, as though it were pulling my finger into it. Seems—er—perfectly foolish, sir, but—well—it was a most peculiar sensation." Robert had an unusual vocabulary for his fifteen years.