188 A FULL DISCOVERY. tree, called by some the Nicobar cedar, and grow- ing in great abundance in all the southern islands. Its wood is hard, black, and very heavy. From December to May it is covered with blossom, and bears a fruit somewhat resembling a cedar or pine- apple, but more like a berry, full of eyes or pus- tules, discharging a gum or resinous fluid. About these trees, when in bloom or bearing fruit, I have seen innumerable flocks of these little birds, flying and fluttering like bees round a tree or shrub in full flower, and am of opinion that they there gather the materials for their nests. I relate the fact, having often watched them with great atten- tion, but will not venture to affirm that I have made a full discovery. I observed before, that these birds dwell in cavities of rocks, like bees in a hive, flying in and out, and building their nests together, hke martins or swallows. The hen con- structs a neat, large, well-shaped nest, calculated for laying and hatching her eggs, and the cock contrives to fix another, smaller and rather more clumsy, close to his mate; for they are not built for the purpose of laying eggs, but for resting- places, whence they may take wing. If they are robbed of them, they immediately begin to build others, and being remarkably active, are able to finish enough in a day to support the weight of their bodies, though they require about three weeks