The number of inanimate objects within the glass, aside from the clothing of the prisoners, was very small; being largely limited to the accessories Holm had provided for himself. The rest did without even furniture, since sleep and fatigue had vanished along with most other vital attributes. Such inorganic things as were present, seemed as exempt from decay as the living beings. The lower forms of animal life were wholly absent.
Robert derived most of his information from Herr Thiele, the gentleman who spoke English with a Scandinavian accent. This portly Dane had taken a fancy to him, and talked at considerable length. The others, too, had received him with courtesy and good-will; Holm himself, seeming well-disposed, had told him about various matters including the door of the trap.
The boy, as he told me later, was sensible enough never to attempt communication with me when Holm was nearby. Twice, while thus engaged, he had seen Holm appear; and had accordingly ceased at once. At no time could I see the world behind the mirror's surface. Robert's visual image, which included his bodily form and the clothing connected with it, was—like the aural image of his halting voice and like his own visualization of myself—a case of purely telepathic transmission; and did not involve true inter-dimensional sight. However, had Robert been as trained a telepathist as Holm, he might have transmitted a few strong images apart from his immediate person.
Throughout this period of revelation I had, of course, been desperately trying to devise a method for Robert's release. On the fourth day—the ninth after the disappearance—I hit on a solution. Everything considered, my laboriously formulated process was not a very complicated one; though I could not tell beforehand how it would work, while the possibility of ruinous consequences in case of a slip was appalling. This process depended, basically, on the fact that there was no possible exit from inside the glass. If Holm and his prisoners were permanently sealed in, then release must come wholly from outside. Other considerations included the disposal of the other prisoners, if any survived, and especially of Axel Holm. What Robert had told me of him was anything but reassuring; and I certainly did not wish him loose in my apartment, free once more to work his evil will upon the world. The telepathic messages had not made fully clear the effect of liberation on those who had entered the glass so long ago.
There was, too, a final though minor problem in case of success—that of getting Robert back into the routine of school life without having to explain the incredible. In case of failure, it was highly inadvisable to have witnesses present at the release operations—and lacking these, I simply could not attempt to relate the actual facts if I should succeed. Even to me the reality seemed a mad one whenever I let my mind turn from the data so compellingly presented in that tense series of dreams.
When I had thought these problems through as far as possible, I procured a large magnifying-glass from the school laboratory and studied minutely every square millimeter of that whorl-center which presumably marked the extent of the original ancient mirror used by Holm. Even with this aid I could not quite trace the exact boundary between the old area and the surface added by the Danish wizard; but after a long study decided on a conjectural oval boundary which I outlined very precisely with a soft blue pencil, I then made a trip to Stamford, where I procured a heavy glass-cutting tool; for my primary idea was to remove the ancient and magically potent mirror from its later setting.
My next step was to figure out the best time of day to make the crucial experiment. I finally settled on two-thirty A.M.—both because it was a good season for uninterrupted work, and because it was the "opposite" of two-thirty P.M., the probable moment at which Robert had entered the mirror. This form of "oppositeness" may or may not have been relevant, but I knew at least that the chosen hour was as good as any—and perhaps better than most.
I finally set to work in the early morning of the eleventh day after the disappearance, having drawn all the shades of my living-room and closed and locked the door into the hallway. Following with breathless care the elliptical line I had traced, I worked around the whorl-section with my steel-wheeled cutting tool. The ancient glass, half an inch thick, crackled crisply under the firm, uniform pressure; and upon completing the circuit I cut around it a second time, crunching the roller more deeply into the glass.