The old Pensioner had been a land surveyor. The compass which he used was a poor thing; but he had run many lines with it through the grand old forest. One day, as Paul was weeding the onions, it occurred to him that he might become a surveyor; so he went into the house, took the compass from its case, and sat down to study it. He found his grandfather's surveying-book, and began to study that. Some parts were hard and dry; but having resolved to master it, he was not the boy to give up a good resolution. It was not long before he found out how to run a line, how to set off angles, and how to ascertain the distance across a river or pond without measuring it. He went into the woods, and stripped great rolls of birch bark from the trees, carried them home, spread them out on the table, and plotted his lines with his dividers and ruler. He could not afford paper. He took great pleasure in making a sketch of the ground around the house, the garden, the orchard, the field, the road, and the river. The people of New Hope had long been discussing the project of building a new road to Fairview, which would cross the pond above the mill. But there was no surveyor in the region to tell them how long the bridge must be which they would have to build. "We will send up a kite, and thus get a string across the pond," said one of the citizens. "I can ascertain the distance easier than that," said Paul. Mr. Pimpleberry, the carpenter, who was to build the bridge, laughed, and looked with contempt upon him, Paul thought, because he was barefoot and had a patch on each knee. "Have you ever measured it, Paul?" Judge Adams asked. "No, sir; but I will do so just to let Mr. Pimpleberry see that I can do it." He ran into the house, brought out the compass, went down to the edge of the pond, drove a small stake in the ground, set his compass over it, and sighted a small oak-tree upon the other side of the pond. It happened that the tree was exactly south from the stake; then he turned the sights of his compass so that they pointed exactly east and west. Then he took Mr. Pimpleberry's ten-foot pole, and measured out fifty feet toward the west, and drove another stake. Then he set his compass there, and took another sight at the small oak-tree across the pond. It was not south now, but several degrees east of south. Then he turned his compass so that the sights would point just the same number of degrees to the east of north. "Now, Mr. Pimpleberry," said Paul, "I want you to stand out there, and hold your ten-foot pole just where I tell you, putting yourself in range with the stake I drove first and the tree across the pond." Mr. Pimpleberry did as he was desired. "Drive a stake where your pole stands," said Paul. Mr. Pimpleberry did so. "Now measure the distance from the one you have just driven to my first stake, and that will be the distance across the pond," said Paul. "I don't believe it," said Mr. Pimpleberry.