The clay that lined his hollow tree was sufficiently dry at last for Grenville's fire. The other accessories, all more thinly coated, were likewise ready for his use. He began in the morning to heat his natural chimney against the actual needs of afternoon. The small fire kindled upon its hearth established at once the efficiency of the draught. Not without a certain boyish eagerness in the culmination of his labors, Sidney began the assemblage of his various paraphernalia an hour at least before noon. His molds and crucibles he carefully brought from the summit of the terrace, disposing them as conveniently as his crude conditions permitted. All his rusted scraps and useless bits of brass and bronze were divided into parcels, while salt, some powdered charcoal, and an over-abundant supply of saltpeter were provided to be used as flux, according as the smelting might demand. He could not be certain of which he should use till experiment should determine which, if any, rendered good results. The principal difficulty, he soon discovered, would be adding the fuel to his flames. His smelter-door was not well arranged for this essential business. He expected, however, to heap a considerable quantity of wood inside before the chimney should become too hot. Later he thought a lot of short material could be readily introduced, and against this need he gathered an impressive heap of branches, which he broke to a workable length. Elaine was with him when at last the work began. She was far more excited than Grenville seemed, since it appeared to her no less than a miracle that any man, in a place like this, should dare assume such a mastery over Jovian metals and flame. She had never before seen anything of smelting. This intimate acquaintance with its mysteries seemed to her a privilege, greatly enhanced by the fact that the lord of it all pretended she was actually helpful. She assisted when he bound the sections of his clay-made molds together. She handed him fuel when the furnace-door was opened and gushes of heat came voluminously forth. The fire, which for a time had loudly roared, was now more intense and quiet. The volumes of smoke, which the "chimney" had belched, had likewise finally ceased. Only a quiver of superheated air and a greenish bit of gas and fume now ascended to the sky. From time to time, Grenville opened the top of the door to peer within. He wrinkled his features, in the waves of heat, and held his hand before his face. At length he adjusted his "tongs" about a crucible and drew it entirely forth. It was white with heat, its surface sparkling with a hundred tiny stars that died on its glowing surface. "Just toss in some of that stuff there on the leaf," he quietly instructed Elaine. "It will soon be ready to pour." The "stuff" was flux, and Elaine obeyed directions like the stanch assistant that she was. She wondered what was coming next.