Holm was born early in the seventeenth century, and had followed with tremendous competence and success the trade of a glass-blower and molder in Copenhagen. His glass, especially in the form of large drawing-room mirrors, was always at a premium. But the same bold mind which had made him the first glazier of Europe also served to carry his interests and ambitions far beyond the sphere of mere material craftsmanship. He had studied the world around him, and chafed at the limitations of human knowledge and capability. Eventually he sought for dark ways to overcome those limitations, and gained more success than is good for any mortal.
He had aspired to enjoy something like eternity, the mirror being his provision to secure this end. Serious study of the fourth dimension was far from beginning with Einstein in our own era; and Holm, more than erudite in all the methods of his day, knew that a bodily entrance into that hidden phase of space would prevent him from dying in the ordinary physical sense. Research showed him that the principle of reflection undoubtedly forms the chief gate to all dimensions beyond our familiar three; and chance placed in his hands a small and very ancient glass whose cryptic properties he believed he could turn to advantage. Once "inside" this mirror according to the method he had envisaged, he felt that "life" in the sense of form and consciousness would go on virtually forever, provided the mirror could be preserved indefinitely from breakage or deterioration.
Holm made a magnificent mirror, such as would be prized and carefully preserved; and in it deftly fused the strange whorl-configured relic he had acquired. Having thus prepared his refuge and his trap, he began to plan this mode of entrance and conditions of tenancy. He would have with him both servitors and companions; and as an experimental beginning he sent before him into the glass two dependable Negro slaves brought from the West Indies. What his sensations must have been upon beholding this first concrete demonstration of his theories, only imagination can conceive.
Undoubtedly a man of his knowledge realized that absence from the outside world if deferred beyond the natural span of life of those within, must mean instant dissolution at the first attempt to return to that world. But, barring that misfortune or accidental breakage, those within would remain forever as they were at the time of entrance. They would never grow old, and would need neither food nor drink.
To make his prison tolerable he sent ahead of him certain books and writing materials, a chair and table of stoutest workmanship, and a few other accessories. He knew that the images which the glass would reflect or absorb would not be tangible, but would merely extend around him like a background of dream. His own transition in 1687 was a momentous experience; and must have been attended by mixed sensations of triumph and terror. Had anything gone wrong, there were frightful possibilities of being lost in dark and inconceivable multiple dimensions.
For over fifty years he had been unable to secure any additions to the little company of himself and slaves, but later on he had perfected his telepathic method of visualizing small sections of the outside world close to the glass, and attracting certain individuals in those areas through the mirror's strange entrance. Thus Robert, influenced into a desire to press upon the "door," had been lured within. Such visualizations depended wholly on telepathy, since no one inside the mirror could see out into the world of men.
It was, in truth, a strange life that Holm and his company had lived inside the glass. Since the mirror had stood for fully a century with its face to the dusty stone wall of the shed where I found it, Robert was the first being to enter this limbo after all that interval. His arrival was a gala event, for he brought news of the outside world which must have been of the most startling impressiveness to the more thoughtful of those within. He, in his turn—young though he was—felt overwhelmingly the weirdness of meeting and talking with persons who had been alive in the seventeenth and eighteenth centuries.
The deadly monotony of life for the prisoners can only be vaguely conjectured. As mentioned, its extensive spatial variety was limited to localities which had been reflected in the mirror for long periods; and many of these had become dim and strange as tropical climates had made inroads on the surface. Certain localities were bright and beautiful, and in these the company usually gathered. But no scene could be fully satisfying; since the visible objects were all unreal and intangible, and often of perplexingly indefinite outline. When the tedious periods of darkness came, the general custom was to indulge in memories, reflections, or conversations. Each one of that strange, pathetic group had retained his or her personality unchanged and unchangeable, since becoming immune to the time effects of outside space.