The nests are never completely deserted, and the parent birds relieve each other in keeping watch on the summit of the neighboring hill. When the Arabs descry an ostrich thus engaged, they conclude that some eggs must be near; and on their approach, the old birds retire, although it is not uncommon, especially in South Africa, for them to show fight. Having discovered the nest, the Arabs dig a hole in the ground near it, in which they place a loaded gun, having a long burning match fastened to the touch-hole; the gun is pointed toward the nest, and is carefully covered over with sand and stones. The birds after a time return and resume their places on the eggs; the gun in due time explodes, and next morning the Arab is rewarded by finding one or perhaps both of the ostriches dead. This is the common mode of killing them practiced in the deserts of Northern Arabia. It is said that some addled eggs are generally found outside the nest, and that the flies bred by their decomposition, furnish the callow young with food. Such may be the case, and if so, it affords a striking illustration of that happy adaptation of means to ends visible throughout the whole economy of nature; but probably the primary reason for these being ejected from the nest is, that more eggs are laid than can be conveniently covered by the bird when sitting, and that she therefore instinctively throws out the surplus; thus at once getting rid of a useless superabundance, and providing a magazine of food for her future tender young. Various are the purposes to which ostrich’s eggs are applied:—first, they are in great favor as a culinary luxury, and are much sought after by the captains of merchant vessels touching at the African ports, being purchased by them of the slave herdsmen, whose perquisites they generally are, for about sixpence each. A good sized egg weighs eleven ounces, is near seven inches in depth, and holds five pints and a quarter; consequently it is considered to afford a meal which will perfectly satisfy four hungry white men, or eight of the more moderate blacks. The yelk is very rich and luscious, and makes a most enviable omelette, but gourmands agree that the native mode of cooking them is perfect. The Hottentots bury the eggs in hot ashes, and through a small hole in the upper end, the contents are continually stirred until they acquire a certain consistence, which the sable cooks know by experience indicates the right moment for removing them from the ashes to the sackcloth, which covers the traveler’s primitive table. They are then eaten with biscuit, and washed down with copious draughts of corn brandy. The eggs are frequently found to contain small oval pebble-like bodies, about the size of a marrowfat pea, of a pale yellow color, and exceedingly hard. Barrow found as many as twelve in one egg: and they are converted into buttons by the dandified Hottentots, and perhaps also the Boers.