amounts on an average to only 14.10 inches during the year (at lower altitudes it is less, at higher altitudes greater), and this is generally confined to two short seasons of moisture separated from one another by months of absolute drought, which, except in specially favored localities, would destroy any of our ordinary field-crops. But there are small spots, far apart, where irrigation can be practised, and there are other places, apparently deserts, which no white man would think of cultivating, but where Indians raise meagre crops of corn, squashes, and melons.
4. Soil.—He who stands on the brow of the mesa at the Indian pueblo of Walpi, in Arizona, may unravel one secret of Indian agriculture in the arid region, and learn why ancient ruins may be found in the most desolate parts. Six hundred feet below him stretches a sandy plain which at most seasons of the year seems almost an absolute desert, yet in summer it is green with rows of dwarf corn. Little rain falls on it and there is no irrigation; yet the corn grows and furnishes a return which repays an Indian, at least, for his labor. Through the plain runs a gully which at certain seasons drains the water from a high table-land beyond. The water does not all flow off, but in part settles under the sandy surface, and keeps the subsoil moist throughout the year. By planting deep, the Indian farmers reach this moist subsoil, and place their seeds where the long drought cannot destroy them. On the side of the mesa, peach-trees flourish, with hidden moisture that comes out between the rocky strata at the mesa's edge. Localities similar to those described are found in the Navaho land, and similarly used by the Navaho for farms and peach orchards. The myths make frequent allusions to such farms or gardens.
5. A few fields have recently been made by white men in the high meadows of the Zuñi Mountains at altitudes above 8,000 feet, where potatoes, oats, barley, and garden vegetables are raised without irrigation; but farming at such altitudes was never tried by the Navahoes, and they knew nothing of cultivating the crops named above. Beside their aboriginal crops, they have for a long time raised a little wheat. Potatoes grow wild in the Navaho country.
6. Mines.—Fortunately for the Navahoes, no mines of precious metals have yet been discovered on their reservation; although for years past rumors of such discoveries have from time to time been circulated, and unwelcome prospectors have frequently invaded their territory. For many years previous to 1892 the principal attraction lay in the Carrizo Mountains.2 A legend of a mine called the Lost Adam, and of miners murdered in these mountains, had circulated long through Colorado mining camps. Troubles between intruders and Indians became so frequent and threatening in this
