I have already examined the question of population in the Dominions, all of which are to-day sparsely inhabited, so I will now turn to another area, namely, British Tropical Africa, a potentially immensely rich country covering some two and a half million square miles and occupied by forty million inhabitants. To run railways through this country would be similar to running railways through Great Britain less its present elaborate system of roads[5] and with a population numbering about two and a quarter millions. In such conditions railways would most certainly not pay, and would only begin to do so when road feeders had been built and the country had become thickly populated. Footnote 5: There are 178,000 miles of road in Great Britain. _The Road_. As economically the railway is length with little breadth, in undeveloped countries it can only be looked upon as an artery, depending for its freight on the roads and tracks which converge on it. If these roads and tracks be few in number, generally speaking, freights will be insignificant, and the railway, in place of fostering wealth, will swallow it up or stifle it. The railway must, therefore, be skirted by a network of roads. The cheapest form of road is a rough cart track, and where the country consists of grass land and the rainfall is low, as in South Africa, extensive use can be made of bullock wagons for purposes of transportation. The bullock wagon has reached, however, the zenith of its evolution, and is by no means suited for countries where grazing is difficult. If fodder has to be carried in bulk, it at once becomes an uneconomical means of movement. If the country to be traversed is unsuited to this means of transport, we are left with the lorry, and though light box-cars, such as Ford vans, can use rough tracks and frequently move across country, the load carried is so small, that, unless it is of a particularly valuable nature, or distance is short, the cost of carriage becomes prohibitive. We are left, therefore, with the heavy lorry, varying from three to six tons burden. These vehicles obviously demand macadamized roads, which not only are extremely expensive to build, but in a sparsely inhabited country prohibitively expensive to maintain. Here in England, we spend yearly £50,000,000 and more on road repair.[6] In Jamaica, £1,000,000 is spent on the maintenance of lorry roads. In both countries this means that each inhabitant has to pay slightly more than £1 a year to meet the road repair bill. In tropical countries, where torrential rains fall and vegetation luxuriates, the macadamized road is out of the question, so also is it in desert land where the sand is apt to silt over the roadways. Footnote 6: In 1914–1915 the maintenance of roads cost £19,000,000, in 1921–1922 this sum had risen to £45,500,000.