Other than those in the Red Sea, the only pearl resources in Africa which have received attention are on the eastern coast, south of the Gulf of Aden. Little information exists as to the origin of these fisheries. In a paper published by the Lisbon Geographical Society, January, 1903, Señor Ivens Ferranz states that, according to tradition, in remote times the Ibo Archipelago, on the northeast coast of Portuguese East Africa, was inhabited by a Semitic colony, which located there to fish for pearls, and these were carried through the Red Sea to King Solomon. He adds that there is little doubt that, after the great emigration which started from the Persian Gulf in 982 and founded Zanzibar, Kilwa, and Sofala on this coast, some Arabs engaged in fishing for pearls about the islands near Sofala.
In 1609 Joao dos Santos wrote that on the sandy sea bottom about the Bazaruto Islands, which are about 150 miles south of Sofala, there were many large oysters which bore pearls, and the natives fished for them by diving in practically the same manner as in the Persian Gulf.[[182]]
In a personal memorandum, Sir Robert Edgcumbe states that in the very early times of Portuguese exploitation on the eastern coast of Africa, pearl fishing was carried on in these waters. For a long period the tenure of power exerted by the Portuguese was of a feeble character; they practically occupied no position of importance on the mainland, but seized upon stations on the islands which offered decent harbors. Thus their chief settlements, such as Mozambique and Ibo, were on islands lying off the coast, and until recent years they made no serious attempt to occupy the mainland.
Arabs and Banyans carried on the commercial traffic of the country, as they still do, and they were more truly the masters of this coast than were the Portuguese, who were little more than nominal rulers. Trading to and from India in their small dhows, the Arabs and Banyans had full knowledge of the value of pearls, and undoubtedly secured all that were obtainable. But they observed no restrictions, and without doubt—for a time, at any rate—greatly impaired the productive power of the fisheries.
The principal pearl reefs of East Africa, so far as known at present, extend along the coast of the German East African territory from the Province of Uzaramo to the Rovuma River, the southern limit of that territory, and also into Portuguese East Africa as far south as Pemba Bay, a total distance of about 300 miles. Along much of this coast, there are islands lying from one to two miles off shore, and between these islands are barriers of reefs, which create a series of lagoons. In these lagoons, protected by the islands and the reefs from the influence of the surf formed by the Indian monsoons, there are large patches of coral rock and groups of living coral, which form excellent attachments for the pearl-oysters.
It is only recently that serious attention has been paid to these pearl resources, although year by year a considerable number of pearls have been collected by the natives and sold to Arabs and Banyans, who have sent them chiefly to India by way of Zanzibar. The natives of these parts are not very expert in diving, and they collect the oysters principally by wading out as far as they can at low tide. They do not wait for the mollusks to attain a proper age, and as a result they find few pearls of large size. Many parcels of pearls fished in this very elementary way pass through the custom-house, where they are subject to a small duty for export, and others are smuggled out of the country. Quantities of seed-pearls are sent to India, where they are used principally as a medicine and in cosmetics; and occasionally there are rumors that some choice pearls have been discovered.
In the German territory a concession of the fisheries was granted a few years ago to Dr. Aurel Schulz; and, although we are not in position to say what success he has met with, it is reported that he has secured a considerable number of pearls under four grains in weight, of fair shape and quality and of good marketable value.
A concession of the pearl fishery on the Portuguese coast north of Ibo has been granted to the East African Pearl Company. For this company an examination of the resources is now being made by Mr. James J. Simpson, acting under direction of Prof. W. A. Herdman, of the Liverpool University, the technical advisor of the Ceylon Company of Pearl Fishers.
At least four species of pearl-bearing mollusks exist here; these are Margaritifera vulgaris, M. margaritifera, Pinna nobilis, and a species of Perna, named in the order of their importance. A preliminary report of Mr. Simpson (supplied through the courtesy of Sir Robert Edgcumbe), states that among the Ibo Islands about one half of the bottom is sandy and the other half is covered with detached pieces of coral rock, groups of living corals, masses of nullipore, and expanses of fixed seaweed. On all of these in the shoal waters, there is such an abundance of pearl-oysters (M. vulgaris) that a single diver, by simply descending and bringing up a few in his hands each time, can secure about 200 in fifteen minutes. Oysters also occur singly on the sandy bottom, but not so abundantly. Within the three-year-old oysters there are many seed-pearls. It is evident that there has been an extensive removal of large oysters in recent years and that large pearls were then found; but the depredations of the natives now prevent the mollusks from attaining an age and size which render them useful as pearl-bearers.
Said Mr. Simpson in his report: “The women here play great havoc on the reefs by going out daily and collecting the pearl-oysters at low tide. All along the coast from Muliga Point to Arimba the shores are covered with shells. At one place we came across a heap of freshly-opened oysters which consisted of thirty or forty thousand at the lowest estimate; while an older heap contained between forty to sixty millions. Four women who were fishing on the reefs while we were there had over two thousand oysters in their baskets. Thus it is evident that immense quantities are annually destroyed. And the worst feature is that out of those destroyed, not one per cent. were over two years old.”