'A rainproof roof can't be flat; it has to be sloped. Especially for something on level ground, a triangular roof is the only way to go.'
Recalling his bold idea about mortise and tenon joints from yesterday's work, he knew there was no time to hesitate. He picked up a few long branches he had chopped from the top of the Light Wood and carved a U-shaped notch into the thick base of one.
He overlapped the notches of two branches, then carefully shaved away slivers of wood to adjust the fit.
CLICK.
With a faint, crisp sound, the two branches locked together tightly, forming a right-angled triangle.
He repeated the process to make an identical frame for the other side, then drove them into the earth on either side of the root cellar.
The extra length he had left at the top of the frames now naturally formed a Y-shaped cradle. By laying another branch horizontally across it, he created a sturdy, triangular A-frame.
