(i) The common law and the Act of 1774: The early common law, or custom of the realm, made a man responsible in an action of case if his fire spread and burnt his neighbour's house. Much that appears in the cases collected in Comyn's Digest under the heading "Action upon the Case for Negligence: in keeping his fire" is now obsolete, but the main principles of the common law concerning fire still stand in the background of the law to-day. The earliest case, and the one often referred to in later reports, is Beaulieu v. Finglam [1] . That it still has vitality appears from the quotation of the Year Book made by Lord Goddard C.J. in Balfour v. Barty-King [2] , and recently by McGregor J. in Eriksen v. Clifton [3] . The averment was that the defendant had so negligently kept his fire (ignem suum tam negligenter custodivit) that the goods of the plaintiff were burnt. What weight should be put upon the word negligenter there, and whether it was traversable, are questions that have been debated by very learned writers. We do not have to decide the issue between Wigmore and Winfield; for, whatever it meant, the word did not import the modern idea of tortious negligence. It is therefore enough to say that, as Sir Percy Winfield showed, it is not correct that the spread of a fire created at common law an absolute liability altogether irrespective of any fault of the man from whose land it spread. The rule seems rather to have been that a householder was responsible for his fire - and that meant any fire lighted by an inmate of his house: but he was not responsible for a fire started by a trespasser. Although not absolute, this liability was rigorous; and counsel feelingly protested in Beaulieu v. Finglam [1] : "the defendant will be undone and impoverished all his days if this action is to be maintained against him, for then twenty other such suits will be brought against him for the same matter". To which Thirning C.J. replied: "What is that to us. It is better that he be utterly undone than that the law be changed for him". And for three hundred years it continued virtually unchanged, as can be seen from Turberville v. Stampe (1697). That case, important in the development of the law of vicarious liability for the acts of a servant as well as in relation to fire, is reported in many places: by Lord Raymond, Salkeld, Comyns, Comberbach, Carthew, Skinner, and elsewhere. Lord Raymond [4] gives the best report of the argument; but the record is set out in full by Salkeld [5] . A fire had been lit to burn off stubble in a field. The majority of the court said "a man ought to keep the fire in his field, as well from the doing of damage to his neighbour, as if it were in his house, and it may as well be called suus the one as the other": but it would be relevant to prove that "a wind and tempest arose and drove it into his neighbour's field". The ideas of remoteness of damage, and of unforeseen occurrences breaking the sequence of cause and consequence, were coming into the law. But the general principle remained: every man was liable for damage caused by his fire whether it was lit by him or by his servant. Parliament at last took a hand. The Act 6 Anne c. 31 (1707), continued by 10 Anne c. 14, provided that no action should be had against any person "in whose house or chamber any fire shall accidentally begin, or any recompense be made by such person for any damage suffered or occasioned thereby, any law usage or custom to the contrary notwithstanding". Blackstone stated the reason and policy of this as "for their own loss is sufficient punishment for their own or their servants' carelessness". The provision was continued in later enactments, culminating in the Fires Act, 1774, s. 86, which provided that no action shall be against any person "in whose house, chamber, stable, barn or other building or on whose estate any fire shall accidentally begin ". This Act, it has generally been accepted, became part of the law of Western Australia on the foundation of the Colony; and it has not been repealed there. In terms it might seem to apply to this case, as it has been construed as applying to country lands as well as to houses in cities and towns. But, although some reliance was put upon it in the argument, I do not think it directly affects the question here. True, the fire in the tree did "accidentally begin"; for that phrase has been held to mean a fire that begins by inevitable accident, as distinct from one caused intentionally or by the negligence of someone for whom the landowner was responsible: Filliter v. Phippard [1] . But the effect of the statute is narrowed by the decisions that it does not apply when a fire, although beginning without negligence, spreads as the result of negligence: Musgrove v. Pandelis [2] , and see Job Edwards Ltd. v. Birmingham Navigations [3] and Eastern Asia Navigation Co. Ltd. v. Fremantle Harbour Trust Commissioners [4] per Fullagar J. [5] . And that, according to the finding of the learned trial judge was what happened here. But putting the statute aside does not mean that we are thrown back to the rigorous rule of the mediaeval common law. This Court has held that the old rules have been absorbed into the principle of Rylands v. Fletcher [6] ; and that the strict liability of the common law is subject to the qualifications of and exceptions to that principle: Bugge v. Brown [7] ; Hazelwood v. Webber [8] .