After he had looked at twenty trees he could not see much difference; those in the hedge had the moss thickest on the eastern side (he knew which was east very well himself, and wanted to see if the moss knew), and those in the lane just through it had the moss thickest on their western side, which was clearly because of the shadow. The trees were really in a double row, running north and south, and the coolest shadow was in between them, and so the moss grew there most. Nor were the boughs any longer or bigger any side more than the other, it varied as the tree was closely surrounded with other trees, for each tree repelled its neighbour. None of the trees, nor the moss, nor grasses cared anything at all about north or south.
Bevis sat down in the mowing-grass, though he knew the Bailiff would have been angry at such a hole being made in it; and when he was sitting on the ground it rose as high as his head. He could see nothing but the sky, and while he sat there looking up he saw that the clouds all drifted one way, towards his house. Presently a starling came past, also flying straight for the house, and after a while another. Next three bees went over as straight as a line, all going one after another that way. The bees went because they had gathered as much honey as they could carry, and were hastening home without looking to the right or to the left. The starlings went because they had young in their nests in a hole of the roof by the chimney, and they had found some food for their fledglings. So now he could find his way home across the pathless prairie by going the same way as the clouds, the bees, and the starlings.
But when he had reached home he recollected that he ought to know the latitude, and that there were Arabs or some other people in Africa who found out the latitude of the place they were in by gazing at the sun through a tube. Bevis considered a little, and then went to the rick-yard, where there was a large elder bush, and cut a straight branch between the knots with his knife. He peeled it, and then forced out the pith, and thus made a tube. Next he took a thin board, and scratched a circle on it with the point of the compasses, and divided it into degrees. Round the tube he bent a piece of wire, and put the ends through a gimlet-hole in the centre of the board. The ends were opened apart, so as to fasten the tube to the board, allowing it to rotate round the circle. Two gimlet-holes were bored at the top corners of the board, and string passed through so that the instrument could be attached to a tree or post.
He was tying it to one of the young walnut-trees as an upright against which to work his astrolabe, when Mark arrived, and everything had to be explained to him. After they had glanced through the tube, and decided that the raft was at least ten degrees distant, it was clearly of no use to go to it to-day, as they could not reach it under a week’s travel. The best thing, Mark thought, would be to continue their expedition in some other direction.
“Let’s go round the Longpond,” said Bevis; “we have never been quite round it.”
“So we will,” said Mark. “But we shall not be back to dinner.”
“As if travellers ever thought of dinner! Of course we shall take our provisions with us.”
“Let’s go and get our spears,” said Mark.
“Let’s take Pan,” said Bevis.
“Where is your old compass?” said Mark.