The run which I visited bears about 120,000 sheep,--and they wander over about 1,200,000 acres. For all these sheep, and for all this extent of sheep-run, it is necessary to obtain water by means of wells, sunk to various depths from fifty to one hundred and twenty feet. The water can always be found,--not indeed always at the first attempt, but so surely that no land in that region need be deserted for want of it. The water when procured is invariably more or less brackish;--but the sheep thrive on it and like it. The wells are generally worked by men, sometimes by horses; but on large runs, where capital has been made available, the water is raised by windmills. Such was the case at the place I visited. The water is brought up into large tanks, holding from 30,000 to 60,000 gallons each, and from these tanks is distributed into troughs, made of stone and cement. These are carried out in different directions, perhaps two or three from each tank, and are so arranged that sheep can be watered from either side. If therefore there be three such troughs, the sheep in six different paddocks can be watered from one tank,--the well being so placed as to admit egress to it from various paddocks, all converging on the same centre. In this way 10,000 sheep will be watered at one well. As these paddocks contain perhaps 40 square miles each, or over 25,000 acres, the animals have some distance to travel before they can get a drink. In cold weather they do not require to drink above once in three days;--in moderate weather once in two days;--in very hot weather they will lie near to the troughs and not trouble themselves to go afield in search of food. On the run which I visited there were twenty of these wells, which, with their appurtenances of tanks, and troughs, and windmills, had cost about £500 each;--and there had been about as many failures in the search of water, wells which had been dug but at which no water was found;--and these had not been sunk without considerable expenditure. It may therefore be understood that a man requires some capital before he can set himself up as a grower of wool on a large scale in South Australia.