It is done in this way.

You dig a square in the steep base of the mountain, and set up two uprights and top them with two joists.

Then you stretch a great sheet of "cotton domestic" from the point where the joists join the hill-side down over the joists to the ground; this makes the roof and the front of the mansion; the sides and back are the dirt walls your digging has left.

A chimney is easily made by turning up one corner of the roof.
Oliver was sitting alone in this dismal den, one night, by a sage-brush fire, writing poetry; he was very fond of digging poetry out of himself -- or blasting it out when it came hard.

He heard an animal's footsteps close to the roof; a stone or two and some dirt came through and fell by him.