The Herr Professor, of course, had his mild eccentricities. A confirmed bachelor, he had no one to talk to except himself, but he considered himself an excellent conversationalist and held constant verbal communion with himself while he worked. That fact, it turned out later, was important, because Mitkey had excellent ears and heard those night-long soliloquies. He didn't understand them, of course. If he thought about them at all, he merely thought of the Professor as a large and noisy super-mouse who squeaked over-much.
"Und now," he would say to himself, "ve vill see vether this eggshaust tube vas broperly machined. It should fidt vithin vun vun-hundredth thousandth uf an indtch. Ahhh, it iss berfect. Und now—"
Night after night, day after day, month after month. The gleaming thing grew, and the gleam in Herr Oberburger's eyes grew apace.
It was about three and a half feet long, with weirdly shaped vanes, and it rested on a temporary framework on a table in the center of the room that served the Herr Professor for all purposes. The house in which he and Mitkey lived was a four room structure, but the Professor hadn't yet found it out, seemingly. Originally, he had planned to use the big room as a laboratory only, but he found it more convenient to sleep on a cot in one corner of it, when he slept at all, and to do the little cooking he did over the same gas burner over which he melted down golden grains of TNT into a dangerous soup which he salted and peppered with strange condiments, but did not eat.
"Und now I shall bour it into tubes, und see vether vun tube adjacendt to another eggsplodes der secondt tube vhen der virst tube iss—"
That was the night Mitkey almost decided to move himself and his family to a more stable abode, one that did not rock and sway and try to turn handsprings on its foundations. But Mitkey didn't move after all, because there were compensations. New mouse-holes all over, and—joy of joy!—a big crack in the back of the refrigerator where the Professor kept, among other things, food.
Of course the tubes had been not larger than capillary size, or the house would not have remained around the mouse-holes. And of course Mitkey could not guess what was coming nor understand the Herr Professor's brand of English (nor any other brand of English, for that matter) or he would not have let even a crack in the refrigerator tempt him.
The Professor was jubilant that morning.
"Der fuel, idt vorks! Der secondt tube, idt did not eggsplode. Und der virst, in seggtions, as I had eggspectedt! Und it is more bowerful; there will be blenty of room for der combartment—"
Ah, yes, the compartment. That was where Mitkey came in, although even the Professor didn't know it yet. In fact the Professor didn't even know that Mitkey existed.