Quickly lift the lid on top. Take the prepared pestle and pound each one of them, you must create a large hemispherical pit. The shape of the pit doesn't need to be very regular, but it must have this curvature, making it easier to grind grain.
He had a wooden pestle, and another one made from fired clay.
The latter pestle was shorter. But its head was larger and round.
He used the pestle as a pounder, treating the stone as a mortar, repeatedly performing the grinding action, making the pit in the middle progressively smoother and more curved.
In about five or six minutes, one was done.
Pour cold water over it to cool and harden it.
The firewood underneath was pulled out and stuffed into the ashes.
After another five or six minutes, another one was completed, although the shape of the pit was not very pleasing.
Also pour cold water.
Continue processing the grates. Until he was weary, then go to sleep.
The next morning, first carry the two stone mortars down one by one.
