Distance can also be judged by sound; that is to say, if you see a gun fired in the distance, and you count the number of seconds between the flash and the sound of the explosion reaching you, you will be able to tell how far off you are from the gun.
Sound travels at the rate of 365 yards in a second; that is, as many yards as there are days in the year.
A Scout must also be able to estimate heights, from a few inches up to three thousand feet or more.
The way to estimate the distance across a river is to take an object x, such as a tree or rock on the opposite bank; start off at right angles to it from a, and pace, say, ninety yards along your bank; on arriving at sixty yards, plant a stick or stone, b;
on arriving at c, thirty yards beyond that, that is ninety from the start, turn at right angles and walk inland, counting your paces until you bring the stick and the distant tree in line; the number of paces that you have taken from the bank c d will then give you the half distance across a x.
