When the challenge to war, recorded in the first chapter, startled the British people, it met with an immediate response alike in the home islands, and in the Colonies, in India, or elsewhere, wherever they happened to be. In order to understand the problems of no small complexity confronting the statesmen at home and the generals who in the field had to carry out the will of the nation by taking up the gauntlet so thrown down, it is necessary, first, that the characteristics of the vast area which was about to become the scene of operations should be realised; secondly, that the strength of the forces on which the challenger relied for making good his words should be estimated; and, thirdly, that certain peculiarities in the constitution of our own army, which materially affected the nature of the task which lay before both Ministers and soldiers, whether in London or in South Africa, should be recognised. The next three chapters will deal in succession with each of these subjects. The attempt which is here made to portray in a few pages the mountains, the rolling prairies, and the rivers of the sub-continent must be aided by an examination of the map which has been specially prepared in order to make the description intelligible. [Sidenote: General aspect of area.] The tableland of South Africa is some 1,360,000 square miles in extent, and of a mean altitude of 3,000 to 5,000 feet above sea level. To the Indian Ocean on the east it shows a face of scarped mountains. Following the coast-line at a distance inland of from 70 to 100 miles, these sweep round from north to south: then stretch straight across the extreme south-west of the continent through Cape Colony, dwindling as they once more turn northward into the sand-hills of Namaqualand, and rising again to the eminences above Mossamedes in Portuguese territory. The rampart, however, though continuous for a distance of more than 1,200 miles, scarcely anywhere presents an abrupt wall to the seaboard, but on the contrary descends to it in some parts in one gigantic step, in others in a series of steps, or terraces. [Sidenote: Cape Colony: the Karroos.]