This appeal from that order raises for our decision the substantial question whether, in an action of libel by a plaintiff who corresponds to the description contained in the defamatory matter published by the defendant, and who has been indentified with the description by readers knowing him, it is a defence that in fact there is another person who also sufficiently corresponds to the description, and who is actually the person intended to be referred to by the author of the libel, or by the defendant who published it. The decision of this question appears to me to depend upon the degree to which, under the influence of the judgment in E. Hulton & Co. v. Jones[17], liability for libel has come to depend upon the actual operation of the words published as a disparagement of the plaintiff's reputation. It is the publication, not the composition of a libel, which is the actionable wrong. Often the person sued for publishing is not the writer. The injury done by a libel arises from the effect produced upon its readers. These considerations naturally led to a rigorous application to libels of the rule that the meaning of a document should be determined independently of the actual intention which the writer entertained. The acceptance of a criterion of liability which adopted, not the intention actuating the writer, but the understanding produced in the reader, was aided by the rule, which can be traced back to an early time, that for the interpretation of a libel evidence could be received of particular circumstances affecting its meaning, and of the actual interpretation which persons conversant with those circumstances affixed to it. But in all documents a marked distinction exists between ascertaining what are the ideas conveyed concerning the persons or physical objects referred to, and identifying the persons and objects so referred to. The latter process consists in correctly associating an existing person or thing with a description contained in the document. Where the description or means of identification consists in or includes proper names, it must often be the case that more than one person can be found to answer it. If the document must have a legal effect on one only of these persons, no means exists of determining to which it refers, except by an inquiry into the contents of the writer's mind. But until two or more are found who do answer the description, or to whom it applies indifferently or in an equal degree, no occasion arises for such an inquiry. Ubi in verbis nulla ambiguitas, ibi nulla occurrit voluntatis quœstio. The cause of action consists in publication of the defamatory matter of and concerning the plaintiff. It might be thought, therefore, that, in any event, this warranted or required some investigation of the actual intention of the publisher. But his liability depends upon mere communication of the defamatory matter to a third person. The communication may be quite unintentional, and the publisher may be unaware of the defamatory matter. If, however, the publication is made in the ordinary exercise of some business or calling, such as that of booksellers, newsvendors, messengers, or letter carriers, and the defendant neither knows nor suspects, nor using reasonable diligence ought to know or suspect the defamatory contents of the writing, proof of which facts lies upon him, his act does not amount to publication of a libel. It is scarcely consistent with this doctrine to look for the publisher's actual intention, even for the purpose of applying the libel to one to the exclusion of another or other persons, either of whom the description it contains would effectively denote. If it be necessary to find which, of several equally described, was the person actually meant, the intention of the writer, not of the publisher, would appear to govern the answer. An actual intention, whether in writer or publisher, of referring to the plaintiff cannot be treated as irrelevant. Indeed, where the words are capable of relating to the plaintiff, but it is uncertain whether they actually do so, the fact that they are used with him in view appears to be decisive. The reason may be that if words are capable of being read as referring to the plaintiff, and are intended to be so read, it must be presumed in his favour that they actually were so read.