The celebrated traveller Poivre, while occupied one day in picking up shells and coral near Java, penetrated a rather deep cavern at a short distance from the sea shore, and found the sides of it covered with little nests, in the form of a deep shell, firmly fixed to the rock. These nests were taken on board, and several persons who had been in China immediately recognised them as being identical with those that the Chinese seek with such avidity. The birds which had built them were true swallows, of about the size of the humming bird. Poivre adds that, in the months of March and April, the sea from Java to Cochin China is covered with spawn, which has the appearance of half-dissolved glue, and that he had learned from the Malays and the Cochin Chinese that the salangan builds its nest with this spawn. All agreed on this point. The bird picks it up as he skims the water, or from the rocks where the spawn coagulates. It is at the end of July and the commencement of August that the Cochin Chinese collect the nests, and, as the young birds are hatched in March and April, the species do not suffer by it. By the subsequent examination of these nests it was found that they presented the form of the half of a hollow, lengthened ellipsoid. They are composed, externally, of very thin laminæ, nearly concentric, and laid one over the other. The interior presents several layers of irregular net-work, superposed one over another, and formed of a multitude of threads of the same matter as the external laminæ, and which cross and re-cross in every direction. Their composition, which has a slight taste of salt, is of a yellowish white and demi-transparent; it softens in warm water without dissolving, and increases in volume. It is a substantial food, and would be excellent for persons suffering from exhaustion, whose debile stomachs ill perform their functions. Poivre declares that he never eat anything more fortifying than a pottage made with these nests and some good meat. The salangan nests are of two sorts--the white and the black. It appears that the white nests are those of the same year, and that the black ones belong to an epoch less recent. The birds are engaged about two months in preparing them, and the Chinese do not take them away until the young ones are feathered, and begin to be pretty strong on the wing.[XX-104] * * * * * This nomenclature would be incomplete, did we not briefly mention some kinds of game which appeared with more or less favour on the tables of the ancients. The _Wood-Hen_, dear to the Greeks,[XX-84] was not common at Rome in the time of Varro. The curious reared them in aviaries with other rare birds.[XX-85] The _Bustard_, the _Water-Hen_, and the _Teal_, found many admirers.[XX-86] The Romans reared the last-named,[XX-87] and judged it worthy of notice among the most delicate morsels of the feast.