"Only what I've found out from a study of the model. Apart from that, I've been looking into the subject of aëroplanes for some time. It was the hope of adding to my knowledge of the subject that brought me to North Dakota."
"And you dropped into a villainous conspiracy right at the start off!" exclaimed Cameron. "I'll send a message to Oberon, just as soon as we reach the post, and see if Siwash Charley and his mates can be headed off."
"It won't do any good to send a message, lieutenant," said Matt. "Siwash knows enough to make himself scarce. Better let the matter drop—for the present, anyhow."
"But there's Murgatroyd. He's got himself into a pretty kettle of fish. You can go after him."
"I don't want to bother with him, nor with any one nor anything else but the aëroplane for the next two weeks."
"I guess your head's level on that point," mused Cameron. "However, if Siwash Charley shows up on the reservation while you're at work, we'll lay him by the heels and throw him into the guardhouse. When are you going to put the aëroplane together?"
"This afternoon," replied Matt. "There's no time to lose."
An hour later they were at the post. Black had made up his mind to remain over until the following day, and Matt paid him his fifty dollars, and thanked him for his work with the motor car.
Following a late breakfast at the post, Matt went down to meet Jake and superintend the unloading of the aëroplane. Selecting a favorable site for the experiments with the aëroplane required time, and dinner was ready at the post before Matt and Cameron had picked out a spot which they considered most favorable for the initial trials.
Following dinner, Matt and McGlory, in their working togs, and accompanied by the lieutenant, hustled down the hill to begin work with the aëroplane.