We sat down on some packing-boxes after our first day of indoor labor, and watched the sun settle slowly beyond the silvered Mazaruni. And a song, not of the tropics, but bubbling and clear and jubilant as that of our northern singers, rang out from the single tall palm standing in our front compound. Clinging to the topmost frond was an oriole, jet as night, with the gold of sunshine on crown and shoulders and back. He was singing. While he sang, a second oriole swooped upward between two vanes of a frond to a small ball of fibers knotted close to the midrib. The event had come and it developed swiftly. We seized a great ladder and by superhuman efforts raised it little by little, until it rested high against the smooth trunk. One of us then mounted the swaying rungs, reckless with excitement, and thrust his hand into the nest. It was withdrawn and went to his mouth, and down he came. To our impatient, impolite inquiries, he answered only with inarticulate mumblings and grunts. He reached the ground and into his pursed hands carefully regurgitated an egg--white, with clustered markings of lavender and sepia about the larger end. We looked at each other and grinned. Words seemed superfluous. Later I believe we quieted down and danced some kind of a war-dance. Our feelings had then reached the stage where they could at least be expressed in action. Perhaps it was not altogether the scientific joy of gazing at and possessing the first known egg of the _moriche_ oriole. I know that by sheer perversity I kept thinking of the narrow-gauge canyon of a city street, as I gloried in this cosmic openness of tropical river and jungle and sunset. Only in an aeroplane have I experienced an equal spatial elation. Our bird-nester told us that there was a second egg, and said something about not daring to put two in his mouth lest he slip and swallow both. But later, in a moment of weakness, he admitted the real reason,--that he had not the heart, after the glorious song and this splendid omen of our work, to do more than divide the spoils fifty-fifty with the orioles. Self-control was rewarded, as the other egg hatched and we learned a secret of the juvenile plumage of these birds, while the songs of the _cadouries_, as the Indians call them, were heard month after month at our windows.