Next a tub of mixed mortar was carried to the level spot decided upon as the place whereon to erect the "furnace." It was not much of a stove that Dave and Dan built, yet it was fitted and destined for the preparing of many a meal in record time.

First of all, Dave marked off the space to be used.

Four parallel lines of bricks, each line five bricks long, were laid on the ground.

Dave, with a two-foot rule, measured a distance of sixteen inches between each row.

Then began some amateur brick-laying.