The method of procuring these nests is not unattended with danger. Some of the caves are so precipitous, that no one, but those accustomed to the employment from their youth, can obtain the nests, being only approachable by a perpendicular descent of many hundred feet, by ladders of bamboo and rattan, over a sea rolling violently against the rocks. When the mouth of the cave is attained, the perilous task of taking the nests must often be performed by torch-light, by penetrating into recesses of the rock, where the slightest slip would be instantly fatal to the adventurers, who see nothing below them but the turbulent surf, making its way into the chasms of the rock--such is the price paid to gratify luxury. After the nests are obtained, they are separated from feathers and dirt, are carefully dried and packed, and are then fit for the market. The Chinese, who are the only people that purchase them for their own use, bring them in junks to this market, where they command extravagant prices; the best, or _white_ kind, often being worth four thousand dollars per pecul,[19] which is nearly twice their weight in silver. The middling kind is worth from twelve to eighteen hundred, and the worst, or those procured after fledging, one hundred and fifty to two hundred dollars per pecul. The majority of the best kind are sent to Pekin, for the use of the court. [Footnote 19: A Chinese weight, equal to 133-1/2 lbs. avoirdupois.] It appears, therefore, that this curious dish is only an article of expensive luxury among the Chinese; the Japanese do not use it at all, and how the former people acquired the habit of indulging in it, is only less singular than their persevering in it. They consider the edible bird's-nest as a great stimulent, tonic, and aphrodisiac, but its best quality, perhaps, is its being perfectly harmless. The labor bestowed to render it fit for the table is enormous; every feather, stick, or impurity of any kind, is carefully removed; and then, after undergoing many washings and preparations, it is made into a soft, delicious jelly. The sale of birds'-nests is a monopoly with all the governments in whose dominions they are found. About two hundred and fifty thousand peculs, at a value of one million four hundred thousand dollars, are annually brought to Canton. These come from the islands of Java, Sumatra, Macassar, and those of the Sooloo group. Java alone sends about thirty thousand pounds, mostly of the first quality, estimated at seventy thousand dollars. I am indebted for much information on this curious article of commerce, to the captain of a Java ship, a very well informed man, trading regularly to China, who had large quantities on board, and whose wife, a native of that country, to satisfy my curiosity, prepared a dinner for me of Chinese dishes, including the bird's-nest and the sea-slug, both of which I partook of, and found them very palatable.--_Berncastle's Voyage to China._ THE PASSION FOR COLLECTING BOOKS.