A surveyor's line is always absolutely straight, except where it meets an insurmountable object, when it makes a right-angle turn to avoid the object, then goes straight ahead again.
"All trees that stand directly on the line of a survey have two notches cut on each side of them and are called 'sight trees.' Bushes on or near the line are bent by the woodsman at right angles to it.
"When a blaze line turns abruptly so that a person following it might otherwise overlook it, a long slash is made on that side of the tree which faces the new direction.

There are other forms of blazes, such as marking section corners, boundaries and the like, which it is unnecessary for you to know now, but with which it might be wise for you to familiarize yourselves as you go along.

This is the end of your first lesson." "There's the fork of the river that we are goin' to camp on," called Joe, riding down a steep bank, followed by the Overlanders, their ponies slipping and sliding until they had reached the more level ground near the stream.
"We camp here," announced the forest woman.

"If ye don't like it, pick out yer own camp.

The bear and I stay right here." Dismounting, Tom strode over to the tree under which Joe had announced her intention of making camp, and, placing a hand on it, gazed up along its length, then at the adjacent trees.
"She's stood here for a hundred years or more, and I reckon no wind will blow her down to-night.