was represented, and published by Messrs. WILLIAM CLOWES & SONS. The edible birds'-nests are already a source of considerable revenue to the Government, who let out the collection of them for annual payments, and also levy an export duty as they leave the country for China, which is their only market. The nests are about the size of those of the ordinary swallow and are formed by innumerable hosts of swifts--_Collocalia fuciphaga_--entirely from a secretion of the glands of the throat. These swifts build in caves, some of which are of very large dimensions, and there are known to be some sixteen of them in different parts of British North Borneo. With only one exception, the caves occur in limestone rocks and, generally, at no great distance from the sea, though some have been discovered in the interior, on the banks of the Kinabatangan River. The exception above referred to is that of a small cave on a sand-stone island at the entrance of Sandakan harbour. The _Collocalia fuciphaga_ appears to be pretty well distributed over the Malayan islands, but of these, Borneo and Java are the principal sources of supply. Nests are also exported from the Andaman Islands, and a revenue of £30,000 a year is said to be derived from the nests in the small islands in the inland sea of Tab Sab, inhabited by natives of Malay stock. The finest caves, or rather series of caves, as yet known in the Company's territories are those of Gomanton, a limestone hill situated at the head of the Sapa Gaia, one of the streams running into Sandakan harbour. These grand caves, which are one of the most interesting sights in the country, are, in fine weather, easily accessible from the town of Sandakan, by a water journey across the harbour and up the Sapa Gaia, of about twelve miles, and by a road from the point of debarkation to the entrance of the lower caves, about eight miles in length.