CHAPTER IV.

A DESERT MYSTERY. Upon this enjoinder of so eminently practical a nature, and thoroughly aware of the necessity of haste, the fallen Mexican rapidly drew with his ramrod end, upon a space of earth smoothed by his foot in its deerskin boot, like an antique tablet under the stylus, a map--rude, but, to a navigator, plain and ample. "At this point," said he, "a sunken reef trends north and south, with a break at a little bow a quarter mile from the black rock that juts out all but flush with its ripple. Deep water in …