These enigmas always carry the day. The apparatus of march was once more set in motion toward the adjacent water-sheds. After a considerable journey--rewarded, it must be said, with a succession of cinchona discoveries--they halted near a clearing in the forest, where large heaps of stones and pebbles, arranged in semicircles, attracted their attention. The cascarilleros explained this appearance as due to former arrangements for gold-washing in an old river-bed, the San Gavan or the Ayapata, that had now changed its locality. While examining the unusual appearance an abominable clamor burst from the woods around, and a band of Siriniris appeared, led by a lusty ruffian crowned with oriole feathers, whom the travelers recognized as having been among their previous acquaintances. The encounter was very disagreeable, but the strangers determined to make the best of it. The manner of this band of Indians was somewhat different from that of the others. They brought nothing for barter, and had an indescribably coarse and hardy style of behavior. The travelers determined to buy a little information, if nothing better, with their knives and fish-hooks. Garcia was accordingly instructed to demand the meaning of the heaps and causeways of stones. The savages laughed at first, but finally informed the visitors that the constructions which puzzled them so had been made by people of their own race many years ago, for the purpose of gathering gold from the river which used to run along there, but which now flowed seven miles off. This information was dear to the historic instinct of Marcoy. He spoke, by his usual proxy, to the Indian of the oriole, commanding him not to begin every explanation by laughing, as he had been doing, but to answer intelligently, promising a reward of several knives. The savage exchanged a rapid glance with his fellows, and then he and they stood up as stiff and mute as the trees. Marcoy then asked him if he had never heard his father or his grandfather speak of the great city of San Gavan, built hereabouts formerly by the Spanish chevaliers, and which the Caranga and Suchimani Indians from the Inambari River had destroyed by fire. The evident recognition of this legend by the savages, and their rapid exchange among themselves of the words _sacapa huayris Ipaños_, induced Marcoy to ask if they could guide them to the site of the former city. They answered that a day's march would be sufficient, and pointed with their arms in the direction of north-north-west.