Overholt never knew; but he expressed his warm thanks for what now seemed a small favour, and with his wooden model of the casting, done up in brown paper, under his arm, he went off to the foundry in Long Island.
Much careful work had been done for him there, and the people were willing to oblige him, and promised that the piece should certainly be ready before Christmas Day, and as much earlier as possible, and should be made with the greatest exactness which the most precise machinery and the most careful work could ensure.
This being settled, Overholt returned to New York and went to two or three places in the Bowery, well known to him, where he bought certain fine tools and pieces of the most perfectly turned steel spring, and several other small objects, which he needed for the construction of the new tangent-balance he had to make for the reversed curve. Finally, he bought a silver watch like the one Newton had sold, and a new pair of skates, presents which the boy certainly deserved, and which would make a very good show at Christmas, when they were to be produced. He felt as if he had come into a large fortune.
Moreover, when he got out of the train at his own station he went into the town, and ordered beforehand the good things for the feast, though there were three weeks still, and he wanted to pay for them in advance, because he felt inside of himself that no one could be quite sure of what might happen in twenty-one days; but the dealers flatly refused to take his money, though they told him what the things would cost. Then Overholt did almost the only prudent thing he had done in his life, for he took the necessary money and five dollars more and sealed it up in an envelope, which he put away in a safe place. The only difficulty would lie in remembering where the place was, so he told Newton about it, and the boy wrote it down on a piece of paper which he pinned up in his own room, where he could see it. There was nothing like making sure of that turkey, he thought. And I may as well say at once that in this matter, at least, no untoward accident occurred, and the money was actually there at the appointed time. What happened was something quite different, and much more unexpected, not to say extraordinary and even amazing; and in spite of all that, it will not take very long to tell.
Meanwhile, before it happened, Overholt and the boy were perfectly happy. All day long the inventor worked at the tangent-balance, till he had brought it to such perfection that it would be affected by a variation of one-tenth of one second in the aggregate speed of ten revolutions, and an increase or decrease of a tenth of a grain in the weight of the volume of the compressed air. It was so sensitive that John Henry and Newton trod cautiously on the floor of the workshop so as not to set it vibrating under the glass clock-shade, where it was kept safe from dust and dampness.
After it had been placed there to wait for the casting, the inventor took the engine to pieces and made the small changes that would be necessary before finally putting it together again, which would probably occupy two days.
Meanwhile the little City of Hope grew rapidly, and was becoming an important centre of civilisation and commerce, though it was only made of paper and chips, and bits of matchboxes and odds and ends cleverly put together with glue and painted; except the people in the street. For it was inhabited now, and though the men and women did not move about, they looked as if they might, if they were only bigger. Overholt had seen the population in the window of a German toy-shop one day when he was in New York to get a new crocusing wheel for polishing some of the small parts of the engine. They were the smallest doll-people he had ever seen, and were packed by dozens and dozens in Nuremberg toy-boxes, and cost very little, so he bought a quantity of them. At first Newton rather resented them, just because they were only toys, but his father explained to him that models of human figures were almost necessary to models of buildings, to give an idea of the population, and that when architects make coloured sketches of projected houses, they generally draw in one or two people for that reason; and this was perfectly satisfactory to the boy, and saved his dignity from the slight it would have suffered if he had been actually seen amusing himself with mere playthings.
Overholt was divinely happy in anticipation of the final success that was so near, and in the daily work that was making it more and more a certainty, as he thought; and then, when the day was over, he was just as happy with the little City, which was being decorated for Christmas, with wreaths in the windows of the houses, and a great many more holly-trees than had at first been thought of, and numberless little Christmas booths round the common, like those in Avenue A, south of Tompkins Square, in New York, which make you fancy you are in Munich or Prague if you go and see them at the right hour on Christmas Eve.
Before long Overholt received a short note from the President of his old College, simply saying that the latter knew of no opening at present, but would bear him in mind. But that did not matter now.
So the two spent their time very pleasantly during the next weeks; but though Overholt was so hopeful and delighted with his work, he knew that he was becoming nervous and overwrought by the great anticipation, and that he could not stand such a strain very long.