"I wish the Britishers could see them!" said one of the group; and another added: "I wish General Washington could be in Lancaster to-morrow night!"

Just before the warm sun dropped behind the tops of the walnut-grove beyond the river the work was done, and a great pile of rockets lay on the grass. Then, as though moved by one impulse, all the boys stripped off their clothes and plunged into the cool pool of the river where it made a great circle under the maples. They had all been born and brought up near the winding Conestoga, and had fished in it and swam in it ever since they could remember.

The next evening the boys of Lancaster sprang a surprise on that quiet but patriotic town. The authorities had forbidden the burning of candles on account of the scarcity caused by the War of Independence, and every one expected that second Fourth of July to pass off as quietly as any other day. But at dusk all the boys gathered at Rob Fulton's house, just outside town, and as soon as it was really dark proceeded to the town square, their arms full of mysterious packages.

It took only a few minutes to gather enough wood in the centre of the square for a gigantic bonfire, and when all the people of Lancaster were drawn into the square by the blaze, the boys started their display of fireworks. The astonished people heard one dull thudding report after another, saw a ball of colored fire flaming high in the air, then a burst of myriad sparks and a rain of stars. They were not used to seeing sky-rockets, most of them had never heard that there were such things, but they were delighted with them, and hurrahed and cheered at each fresh burst. This was indeed a great surprise.

"What are they? Where did they come from? How did the boys get them?" were the questions that went through the watching crowds, and it was not long before the answer traveled from mouth to mouth: "It's one of Rob Fulton's inventions. He read about making them in some book."

The father of one of Robert's friends nodded his head when he heard this news, and said to his wife: "I might have known it was young Rob; I've never known such a boy for making things. His schoolmaster told me the other day that when he was only ten he made his own lead pencils, picking up any bits of sheet lead which happened to come his way, and hammering the lead out of them and making pencils that were as good as any in the school."

The fireworks were a great success; for the better part of an hour they held the attention of Lancaster, and when the last rocket had shot out its stars every boy there felt that the Fourth of July had been splendidly kept. For a day or two Rob Fulton was an important personage, then he dropped back into the ranks with his schoolmates.

It was not long after, however, that Robert set himself to work out another problem. The Fultons lived near the Conestoga, and Robert and his younger brothers were very fond of fishing. All they had to fish from was a light raft which they had built the summer before, and this cumbersome craft they had to pole from place to place. When they wanted to fish some distance down from their farmhouse, they had to spend most of the afternoon poling, and this heavy labor robbed the sport of half its charm. So, a week or two after the Fourth of July, Robert told a couple of boy friends that he was going to make a boat of his own, and got them to help him collect the materials he needed.

He liked mystery, and told them to tell no one of his plans. As soon as school was over the three conspirators would steal away to the riverside, and there hammer and saw and plane to their hearts' content. Gradually the boat took shape under their hands, and after about ten days' work a small, light skiff, with two paddle-wheels joined by a bar and crank, was ready to be launched.

The idea was that a boy standing in the middle of the skiff could make both wheels revolve by turning the crank, and it needed only another boy holding an oar in a crotch at the stern to steer the craft wherever he wanted it to go. Yet, even when the boat was finished, the two other boys were very doubtful whether such a strange-looking object would really work, Robert himself had no doubts upon that score; he had worked the whole plan out before he had chosen the first plank.