The roof may be made of lumber, as shown by Fig. 160, or it may be made of
poles like those shown on the Wyoming Olebo (Fig. 236), or it may be made
of planks and covered with tar paper (Figs. 296, 297, 298, and 299), or it
may be shingled, using barrel staves for shingles, or covered with bits of
old tin roofing tacked over the planking--or anything, in fact, which will
keep out the water. As for looks, that will not count because the roof is
to be afterward covered with sod.