"In what way is the instrument so much more useful than without, and how can we do surveying without it?"
"It does two very important things: First, the telescope, which is a part of it, enables the observer to see much farther and with greater accuracy; and, secondly, it has a graduated scale in degrees which shows the angles. Without these two important qualities we should be compelled to run our lines for short distances only at each sighting, and at each observation it would be necessary to provide a means to get the exact angle with reference to the last line projected. Those features, together with the compass, make the instrument an important requisite for correct surveying."
The boat house was one of the places last to visit, because there was so much to do in the various directions that they had little time to devote to the marine end of their various enterprises. Harry suggested that sailing would be a most desirable outing at different periods, and all consented to the task of rigging out the lifeboat.
The Chief was now so interested in everything he saw that he indicated a desire to take a hand. The Professor was delighted at this beyond measure. He was gradually acquiring the language, as a child would, and his troublesome leg was healing rapidly. The one fear was that, as they had no means of confining him, he might take the first opportunity to leave them, and this was an occasion of more than one talk; but all agreed that no serious consequences would result from his desertion, since it was the belief that he would not attempt to bring his tribe against them.
The only possible danger from his returning was the likelihood that sooner or later his captivity and the knowledge of their location on the island would find its way from tribe to tribe, and in that way at least two of the tribes with which they had come into contact might seek revenge.
Chief went to the boat sheds for the first time, after the events above related, and the one thing which caught his eye was the lifeboat. He started at first, and then made his way toward it, and looked at the Professor, whose eye was quick to note the movement. He was asked if he knew anything about it, and answered affirmatively, but when he was questioned whether his tribe had possession of it at any time, no intelligent response was made, as he evidently misunderstood what was asked.
One of the first weapons which they constructed, after iron had been recovered from the ore, was a bolo, and a number were subsequently manufactured. To this they added several spears. All weapons were kept out of Chief's reach, and the boys were cautioned against permitting him to learn the mechanism and use of the guns. He always looked longingly at the bolos, from the time he had witnessed their dextrous use.
On this occasion the Professor handed him one of the spears, and he was not only pleased but appeared to be extremely gratified at the act. He balanced it in his hand, and held it up in the attitude of throwing it. When they were returning to the shop, Chief balanced the spear, and without the slightest effort threw it fully fifty feet against a tree, striking a light portion of the bark which he had evidently aimed for. This was the signal for applause and clapping of hands.
Fig. 12. Poising the Spear.