When the world below is busy there are about 3,500 Kafirs at work,--some small proportion upon the reef which has to be got into order so that it shall neither tumble in, nor impede the work, nor overlay the diamondiferous soil as it still does in some places; but by far the greater number are employed in digging. Their task is to pick up the earth and shovel it into the buckets and iron receptacles. Much of it is loosened for them by blasting which is done after the Kafirs have left the mine at 6 o’clock. You look down and see the swarm of black ants busy at every hole and corner with their picks moving and shovelling the loose blue soil. But the most peculiar phase of the mine, as you gaze into its one large pit, is the subdivision into claims and portions. Could a person see the sight without having heard any word of explanation it would be impossible, I think, to conceive the meaning of all those straight cut narrow dikes, of those mud walls all at right angles to each other, of those square separate pits, and again of those square upstanding blocks, looking like houses without doors or windows. You can see that nothing on earth was ever less level than the bottom of the bowl,--and that the black ants in traversing it, as they are always doing, go up and down almost at every step, jumping here on to a narrow wall and skipping there across a deep dividing channel as though some diabolically ingenious architect had contrived a house with 500 rooms, not one of which should be on the same floor, and to and from none of which should there be a pair of stairs or a door or a window. In addition to this it must be imagined that the architect had omitted the roof in order that the wires of the harp above described might be brought into every chamber. The house has then been furnished with picks, shovels, planks, and a few barrels, populated with its black legions, and there it is for you to look at.