Girl Scouts of the United States of America, Scouting For Girls, Official Handbook of the Girl Scouts
“ The best kindling is fat pine or the bark of the paper birch. Fat pine is found in the stumps and butt cuts of pine trees, particularly those that died on the stump. The resin has collected there and dried. This wood is usually easy to split. Pine knots are the tough, heavy resinous stubs of limbs that are found on dead pine trees. They, as well as fat pine, are almost imperishable, and those sticking out of old rotten logs are as good as any. In collecting pine knots go to fallen trees that are almost rotted away. Hit the knot a lick with the pole of the axe and generally it will yield ”
