Sumichrast, who, from the state of his hand, was condemned to idleness, remained with the Indian, while I proceeded, in company with Gringalet and Lucien, to reconnoitre the vicinity of our bivouac. Almost immediately, a _yoloxochitl_, a species of magnolia, met our eyes. I called l'Encuerado, who climbed the tree in order to throw us down some of its beautiful sweet-smelling flowers; they are externally of a pinkish-white color, yellow on the inside, and the petals, before they are full-blown, assume the form of a cross, and afterwards that of a splendid star. The Indian did not fail to remind us that an infusion of the glittering leaves of the _yoloxochitl_ is a remedy against diarrh[oe]a, and that its flowers, as their shape indicates, cure palpitation of the heart. A little farther on we recognized a nutmeg-tree, a shrub about ten feet in height, and covered with half-formed fruit. The nutmeg is not cultivated in Mexico, and the tree that produces it is rather rare. The Indians, however, use an enormous quantity of the Molucca nutmegs, either as a remedy or as a condiment--nutmegs, camphor, and asaf[oe]tida being the principal Indian remedies. I next pointed out to my young companion a plant named the _blue herb_, the leaves of which stain the water in which they are soaked with a lovely azure tinge. In Mexico a variety of this vegetable is cultivated, in order to extract from it the coloring matter commonly known under the name of _indigo_. "But how do they manage," asked Lucien, "to obtain from a plant those dark-blue stones that I have seen sold in the market?" "About the month of March," I answered, "are gathered the fresh leaves of the indigo-plant, which is one of the leguminous family, and pound them in mortars made out of the trunks of trees. The sap which results from these leaves, when subjected to a heavy pressure, is of a greenish tinge, and sometimes even colorless; it does not become blue until after fermentation in the open air. The Indians then boil it in an immense copper, and, the water evaporating, the indigo is left in the form of a soft and gelatinous paste, which is subsequently dried in the sun." On approaching the foot of the mountain, I found that it would be impossible for us to climb it the next day, the slope being too steep. I sat down on the trunk of a fallen tree, when I detected a very decided smell of roses. Under the bark of a log _esquina_ Lucien had discovered five or six beautiful insects of an azure-blue color, with red feet; these insects are very common in the sandy soils of Tehuacan, and are used by the ladies of that district to perfume their linen. Delighted at this discovery, Lucien continued his search, hoping to find some more specimens which he intended to take to his mother. He was kneeling down and working energetically, when he pointed out to me an enormous caterpillar.