The definition of royalty is widely expressed in the passages cited from the majority judgments, more widely than the decision of the case required, but it may be that it has received an interpretation even wider than their Honours contemplated. Little assistance is to be obtained from the history of the word. For, as Lord Selborne L.C. said in Attorney-General of Ontario v. Mercer [2] , "in its primary and natural sense "royalties" is merely the English translation or equivalent of "regalitates", " jura regalia ", " jura regia " " [3] . To say that the uses of the word are now figurative and represent analogies to the revenues which some jura regalia were seen to yield to the Crown does not help much to ascertain the scope of present usage. It may be noted, however, that the modern applications of the term seem to fall under two heads, namely the payments which the grantees of monopolies such as patents and copyrights receive under licences and payments which the owner of the soil obtains in respect of the taking of some special thing forming part of it or attached to it which he suffers to be taken. It is not fanciful to trace the extension of the word by analogy from the kind of payments which some of the jura regia enabled the Crown to obtain. We are not concerned with that application of the word which relates to payments to a patentee owner of a copyright or even of a secret process in respect of articles produced or sold, or books printed or sold or works performed or exhibited under his licence. What matters here is the parallel though distinct development of the meaning of the word which seems to arise from payments made to the Crown in respect of metals and the like won or taken from the soil. Similar payments to the owners of mines are regarded as royalties and by an extension not difficult to follow payments made in respect of the taking under the agreement or licence of the owner of land of anything which may be considered part of or naturally attached to the soil such as coal, stone, sand, shells, oil and standing timber came to be spoken of as royalties. Warren and piscary and such rights are not heard of amongst us but conceivably there may be things made the subject of royalty which belong to ownership of land that cannot be considered actually to be part of the soil. In the case of monopolies and the like the essential idea seems to be payment for each thing produced or sold or each performance or exhibition in pursuance of the licence. In the same way in the case of things taken from the land the essential notion seems to be that the payment is made in respect of the taking of something which otherwise might be considered to belong to the owner of the land in virtue of his ownership. In other words it is inherent in the conception expressed by the word that the payments should be made in respect of the particular exercise of the right to take the substance and therefore should be calculated either in respect of the quantity or value taken or the occasions upon which the right is exercised.