The way in which the Dyak works gutta is this:—He wanders in the jungle till he finds a gutta-tree. He cuts it down, and rings it neatly all along the trunk and branches at intervals of a foot or two with a kind of hollow chisel that he brings with him for the purpose. Under each ring he puts a leaf made into a cup to catch the milk-white sap which slowly exudes. Into each of these he puts a little scraped bark of the tree. Then he collects all the sap, and boils it until the gutta is precipitated at the bottom of the pot like a mass of dough. This is taken out while it is still soft, placed upon a board, and kneaded vigorously with the hands, and afterwards trodden with the bare feet. When it is almost too stiff to work, it is flattened out carefully, and then rolled into a wedge-shaped mass. A hole is punched through the thin end, through which a string is put to carry it, and it is ready for sale. This crude gutta has a mottled or marbled light brown appearance, which is given to it by the scraped bark which is mixed with it. The juice of the wild fig-tree (_Ficus_) or of the different species of bread-fruit trees (_Artocarpus_) is sometimes used to adulterate it. Sometimes, instead of working gutta, the Dyaks earn money by collecting canes, or _rotan_. A journey is made by a party of them to some jungle region where canes abound, and they collect the various marketable species of the genus _Calamus_. These canes are creeping plants the stems of which are covered with a hard flinty bark. The leaves are very thorny, and cling to the trees and branches around. The older part of the cane has no leaves. It is very tough and strong, and in size about one-quarter of an inch in diameter. It is easily split, and used for the seats of chairs, etc. Sometimes the Dyaks join others in the collection of edible birds’-nests for the Chinese market. This is a great industry in those parts of Borneo where there are large limestone caves, in which these nests are found. The caves are farmed out by Government, and whatever is obtained over the amount paid to Government is the profit of the workers. In Upper Sarawak certain tribes possess caves in which edible birds’-nests are found, and they divide the nests with the Government. Sometimes Dyaks who wish to earn a little extra money go and help these tribes in collecting birds’-nests, and get a share of the profits, or more often they go to small caves which belong to no one in particular and collect birds’-nests for themselves, and then give a share of what they find to the Government.