“What, a rough bit like a lump of sugar on a loaf of bread?”
“That’s it!” said Will. “Now, you see those, as we row out, seem to grow closer together?”
“Yes, I see, because you’re getting them more in a straight line.”
“To be sure!” said Will. “Well, then, when we get them exactly one in front of the other, they give us our bearings one way.”
“Oh!” said Dick.
“Now, look yonder at that church tower at Gullick,” said Will.
“Yes, I see it.”
“There’s a big tree on the hill to the left of it.”
“Six,” said Dick.
“No, no, not that clump; but that one standing by itself.”