SHIRE, a river of East Central Africa, the only tributary of the Zambezi navigable from the sea. The Shire (length about 37o m.) issues from the southernmost point of Lake Nyasa and almost immediately enters a shallow sheet of water called Malombe or Pa-Malombe, 18 m. broad, and 12 or 13 m. long. A shifting bar of sand obstructs the end of Malombe nearest Nyasa, but does not prevent navigation. Below Malombe the bed of the Shire deepens. The river flows through a mountainous country, and in its descent to the Zambezi valley forms rapids and cataracts, rendering its middle course for a distance of 6o m. unnavigable. The most southern and the finest of these cataracts is called the Murchison Cataract or Falls, after Sir Roderick Murchison, the geologist, who identified himself during the mid Victorian epoch with geographical exploration in Africa. In passing the cataracts the Shire falls 1,200 ft. From the station called Katunga, a short distance below the cataracts, shallow draught steamers can navigate the river when in flood (January March) to its junction with the Zambezi, and thence proceed to the Chinde mouth of the main stream. The scenery of the
lower Shire is very picturesque, the spurs of the plateau forming bold, rocky crags overhanging the water. The river is studded with small islands usually covered by thick grass. A little before the Zambezi is reached the country becomes flat. The Shire joins the main river in about 35° 25' E., 17° 5o' S., at a point where the Zambezi is of great width and presents in the dry season many narrow winding channels, not more than 3 ft. deep, with intervening sandbanks.
The lower part of the Shire is in Portuguese territory; the upper part is in the British Nyasaland Protectorate, to which it is the natural highway. Below Port Herald the Shire is navigable all the year round.
(See ZAMBEZI and BRITISH CENTRAL AFRICA.)