At the sixth point the selection is made.

In all these cases the excavation is by no means a grave destined to receive the Mouse, but a mere trial boring, of inconsiderable depth, its diameter being that of the digger's body.
A return is made to the Mouse, who suddenly quivers, oscillates, advances, recoils, first in one direction, then in another, until in the end the little hillock of sand is crossed.

Now we are free of the brick and on excellent soil.

Little by little the load advances.

This is no cartage by a team hauling in the open, but a jerky displacement, the work of invisible levers.