We passed through large tracts of Mopane country, and my men caught a great many of the birds called Korwe ('Tockus erythrorhynchus') in their breeding-places, which were in holes in the mopane-trees. On the 19th we passed the nest of a korwe just ready for the female to enter; the orifice was plastered on both sides, but a space was left of a heart shape, and exactly the size of the bird's body. The hole in the tree was in every case found to be prolonged some distance upward above the opening, and thither the korwe always fled to escape being caught. In another nest we found that one white egg, much like that of a pigeon, was laid, and the bird dropped another when captured. She had four besides in the ovarium. The first time that I saw this bird was at Kolobeng, where I had gone to the forest for some timber. Standing by a tree, a native looked behind me and exclaimed, "There is the nest of a korwe." I saw a slit only, about half an inch wide and three or four inches long, in a slight hollow of the tree. Thinking the word korwe denoted some small animal, I waited with interest to see what he would extract; he broke the clay which surrounded the slit, put his arm into the hole, and brought out a 'Tockus', or 'red-beaked hornbill', which he killed. He informed me that, when the female enters her nest, she submits to a real confinement. The male plasters up the entrance, leaving only a narrow slit by which to feed his mate, and which exactly suits the form of his beak. The female makes a nest of her own feathers, lays her eggs, hatches them, and remains with the young till they are fully fledged. During all this time, which is stated to be two or three months, the male continues to feed her and the young family. The prisoner generally becomes quite fat, and is esteemed a very dainty morsel by the natives, while the poor slave of a husband gets so lean that, on the sudden lowering of the temperature which sometimes happens after a fall of rain, he is benumbed, falls down, and dies. I never had an opportunity of ascertaining the actual length of the confinement, but on passing the same tree at Kolobeng about eight days afterward the hole was plastered up again, as if, in the short time that had elapsed, the disconsolate husband had secured another wife. We did not disturb her, and my duties prevented me from returning to the spot. This is the month in which the female enters the nest. We had seen one of these, as before mentioned, with the plastering not quite finished; we saw many completed; and we received the very same account here that we did at Kolobeng, that the bird comes forth when the young are fully fledged, at the period when the corn is ripe; indeed, her appearance abroad with her young is one of the signs they have for knowing when it ought to be so. As that is about the end of April, the time is between two and three months. She is said sometimes to hatch two eggs, and, when the young of these are full-fledged, other two are just out of the egg-shells: she then leaves the nest with the two elder, the orifice is again plastered up, and both male and female attend to the wants of the young which are left. On several occasions I observed a branch bearing the marks of the male having often sat upon it when feeding his mate, and the excreta had been expelled a full yard from the orifice, and often proved a means of discovering the retreat.
The honey-guides were very assiduous in their friendly offices, and enabled my men to get a large quantity of honey. But, though bees abound, the wax of these parts forms no article of trade. In Londa it may be said to be fully cared for, as you find hives placed upon trees in the most lonesome forests. We often met strings of carriers laden with large blocks of this substance, each 80 or 100 lbs. in weight, and pieces were offered to us for sale at every village; but here we never saw a single artificial hive. The bees were always found in the natural cavities of mopane-trees. It is probable that the good market for wax afforded to Angola by the churches of Brazil led to the gradual development of that branch of commerce there. I saw even on the banks of the Quango as much as sixpence paid for a pound. In many parts of the Batoka country bees exist in vast numbers, and the tribute due to Sekeletu is often paid in large jars of honey; but, having no market nor use for the wax, it is thrown away. This was the case also with ivory at the Lake Ngami, at the period of its discovery. The reports brought by my other party from Loanda of the value of wax had induced some of my present companions to bring small quantities of it to Tete, but, not knowing the proper mode of preparing it, it was so dark colored that no one would purchase it; I afterward saw a little at Kilimane which had been procured from the natives somewhere in this region.