The council of the defendant municipality proposes to carry out, and has already commenced to carry out, a scheme for the supply of water to the towns of Margate and Snug and a considerable tract of country lying between those two towns. Such a purpose is "extremely desirable and laudable, but one to be attained not by violent means, or means not warranted by law, but by legal means" (per Lord Cairns L.C. in Swindon Waterworks Co. v. Wilts & Berks Canal Navigation Co. [1] ). The scheme involves the construction of a weir on the North West Bay River some distance above the lands of the plaintiffs. From that weir water will be diverted and carried by means of pipes to the lands of the persons to be supplied in the two towns and the intervening territory. In fact the weir has been actually constructed and a number of pipes laid, but no water had been diverted from the stream at the time when this action was commenced. In adopting and proceeding to carry into effect its scheme of water supply the council of the municipality has purported to act under the authority of certain statutes of the State of Tasmania. It will be necessary carefully to examine these statutes, but it may be noted in passing that the learned Chief Justice referred to them collectively as "the water legislation of this State, which might now be termed a chaos." It is clear that, if the scheme is carried into effect, there will be a diminution of the flow of water past the lands of the plaintiffs below the weir. The probable extent of the diminution was in controversy. The Chief Justice said: - "It is apparent that the flow of the stream to the lands of the plaintiffs will be appreciably reduced by the defendant's scheme." But the evidence went, I think, considerably beyond this, and I think that his Honour found much more than this. There was evidence that, when irrigating, the plaintiffs would use something in the vicinity of 1,000,000, gallons per day, that the capacity of the defendant's pumps did not exceed about 250,000 gallons per day, and that in February 1949 the stream carried about 1,600,000 gallons per day. But there was also evidence which strongly suggested (what one would imagine to be highly probable) that the flow of the stream varies greatly according to time of year and seasonal conditions. While at times, no doubt, much more than 1,600,000 gallons per day would flow down the stream, at other times there would most probably be considerably less, and this would naturally occur at dry periods when the plaintiffs' need of water would be greatest. These considerations, which have ample evidence to support them, explain, I think, the learned Chief Justice's finding that the plaintiff company's three intakes take, during the period from December to March, "all the water available and return none of it to the stream," and his later reference to "the present user by H. Jones & Co. Pty. Ltd., taking, as it does, all the available water and not returning it to the stream." The non-return of the water to the stream seems to me (as I shall explain later) to be something of which only a lower riparian owner could complain. I have referred to these two passages from his Honour's judgment only because I think that they show that the defendant's proposed works would not merely involve a sensible diminution of the flow of the stream but would interfere with the use actually made of the water by the plaintiffs before action brought. This is a matter which, whatever other relevance it may prove to have, must necessarily affect the discretion as to whether an injunction should be granted. The object of the action was to restrain the threatened diminution of flow and the plaintiffs (in substance) claimed (1) a declaration that the plaintiffs as owners of lands on the banks of the North West Bay River are respectively entitled to the waters flowing in a defined and natural channel into and forming part of the same as such stream and waters have been accustomed to flow down to the said land subject only to the ordinary and reasonable use of the said stream and waters by the riparian owners higher up upon the said stream; and (2) an injunction to restrain the defendant its servants agents or contractors from constructing the proposed works or obstructing or diverting the water of the said stream so as to interfere in any manner with the rights of all or of any of the plaintiffs as above declared.