The rest of the engineers travelled leisurely down the western slope of the Sierras into a region that became more charming with each mile of progress. It was spring-time. The rainy season was drawing to its close, and the Golden State was at its best. The air was filled with the sweet scents of innumerable flowers, the song of birds, and the music of rushing waters. The bay-trees wore their new spring robes of vivid green, from which the soft winds shook out delightfully spicy odors. The trunks of the manzanitas glowed beneath their wine-red skins, while the madronos were clad in glossy, fawn-colored satins. To the toil-worn explorers, just off the alkaline sands of the parched and verdureless desert, the old mission of San Gabriel, nestled at the base of the western foot-hills, seemed the very garden-spot of the world. Here were groves of oranges, lemons, limes, pomegranates, and olives. Here were roses and jasmines. Here were heliotrope and fuchsias, grown to be trees, and a bewildering profusion of climbing vines and flowering shrubs, of which they knew not the names.