"Not at all necessary," he informed her, candidly. "It's the very worst powder ever made. My charcoal is poor and my proportions wrong, and I only half ground it all together. But it burned! That's enough for me--it burned! It assures us a fire, and I'll make a new batch, that will go off like a Spanish revolution!" He went below at once to gather twigs and fuel, bits of dried grass, and other kindling, and brought a large bundle to the terrace. More carefully, then, he mixed and ground his succeeding sample of the powder. Recalling more clearly the accepted formula, he increased the proportion of saltpeter to something nearer seventy-five per cent. of the whole, approximating thus the standard long since established. Aware that, when he finally came to manufacture an explosive of higher efficiency, he would do much better to wet the ingredients and later dry the finished product, he now proceeded, as before, merely to try for a fire. Thus he presently laid a train of his grayish mixture from one small heap to another, in a place selected for his trial. Over one of the powder pyramids he arranged his combustible straws, twigs, and branches with the nicest care. And when, at length, he struck a white-hot star, divinely potential, into the midst of the second heap, a hissing snake of incandescence and smoke darted swiftly along the surface of rock--and his fire leaped into being. On the towering rock, as on an altar, the flames that meant life to the exiled pair rose goldenly bright and clear. A strange exultation in Grenville's prowess possessed Elaine, as she stood by in wonder, looking on his face. "It shall never go out," he told her, presently, "not if I can prevent it." CHAPTER X THE MASTER POACHER There were woods in abundance about the base of the tufa cliff that would burn almost as slowly and retain their glow about as long as the hardest of anthracite coal. Yet it was not on these that Grenville depended, that particular night, to maintain the fire he had conjured from flint and steel. All those long dark hours he served his altar flame with fuel gathered for the purpose. An easier method for its preservation, by means of the woods that were promptly discovered, he adopted, however, very soon.