that of the impossibility of a proprietary physical control of the embodiments; the second, that of the abstractly incorporeal nature of the composition; and the third, that of the right of public use, which may result from communication of the contents. Sometimes,' the first two objections have been considered as one; at other times, the third has been discussed alone, as if it included the others, or superseded their consideration. But the three should be considered separately in the order in which they have been stated.
To the first objection, the answer has been that, according to the general law of property, the criterion of its capacity for continuance is not the retention, by the original proprietor and his assigns, of the possession or immediate control of the subject. The present or eventual distinguishableness of the subject, enabling him to trace back its identity with what was, in an absolute or qualified sense, his own, suffices for the continuance of his absolute or qualified proprietorship. The proprietorship, thus traced, may have a present or eventual existence, not in the original subject of it, but in a representative product or substitute, which may be specifically similar or different. The distinguishableness may suffice, though embodiments of the subject, or of its product or substitutes, may be multiplied, however changeable may be their positions, and however thej- may be beyond his control. The unauthorized use of the known trade-mark of a manufacturer, or other dealer, is thus actionable. This having been decided in England, at law, in 1824, conforma-bly to more ancient doctrine (3 Barn. & C. 541; 33 Eliz., cited Cro. Jac. 471; Poph. 144), Lord Cottenham in 183S, in a case in equity, where no fraud could be imputed, prevented, by injunction, such a use of trade-marks, and said that the plaintiff had a title to the marks. 3 Mylne & C. 352. Though Lord Langdale afterwards, in 1842, thought that the right in a mere mark, or name in trade, was not proprietary, but that the remedy was, in such cases, founded alone upon the equitable jurisdiction to redress or prevent fraud (6 Beav. 73), his opinion has not been followed. In 1853, Vice Chancellor Wood called a pin-maker’s right of exclusive use of his labels a right of property acquired by user. 11 Hare, 78; 23 Eng. Law & Eq. 55. In 1S56, in the chancery court of appeal, the right in a particular trade-mark was called by Lord Cranworth a legal right, in support of which the jurisdiction of equity was exercised, in order to render it more effectual. 6 De Gex, M. & G. 217. This he would scarcely have said, if he had not agreed with Lord Cottenham in thinking the right proprietary. Specific changes of embodiment are exemplified in cases in which the foreign investments, re-investments, and ultimate returns of commercial adventures are pledged, or otherwise appropriated, to secure pecuniary advances on the outward consignments. For such cases, the rules of the present law of the United States and England resemble those which were applied in the ancient jurisprudence of both Greece (De-mosth. In Laerit. and In Dionysiod.) and Rome. Dig. 22, 2, De Naut. Foen.: also, 44, 7, De Obl. et Act. 23. 45; 1, De Verb. Obl. 122, § 1; Cod. 4, 32, De Usur. 19, 26; § 1; and 4, 33 De Naut. Foen.; Paul. Recept. Sent. 2; 14, De Usur. § 3. The returns from remote regions, in varied specific forms, become the substituted security for the outward adventures. The special property which the lender .had in them, for the purposes of self-security, is transferred to, and continues in, their product or substitute, in whatever ultimate form of investment, or of re-investment, it may exist. [Conrad v. Atlantic Ins. Co.] 1 Pet. [26 U. S.] 444-448; U. S. v. Delaware Ins. Co. [Case No. 14,942]; [Conard v. Nicoll] 4 Pet. [29 U. S.] 291; 1 Bosw. & P. 563; Nesmith v. Dyeing, Bleaching, etc., Co. [Case No. 10,124]; [Grove v. Brien] 8 How. [49 U. S.] 438, 439; [Gibson v. Stevens] Id. 399, 400. This qualified proprietor may not have any control of the particular destinations abroad, or any right of custody of the subject of his security until the termination of the adventure. The returns, before they reach their ultimate destination, may be fraudulently sold, and their proceeds invested wrongfully. The unauthorized investments may then, at the lender’s option, be followed; and, so long as they can be distinguished as the product of, or substitute for, the former security, may be reclaimed by him. His proprietary right ceases only when the subject ceases to be thus distinguishable, and then ceases only because the means of ascertainment fail. 3 Maule & S. 578, as applied in [Conard v. Atlantic Ins. Co.] 1 Pet. [26 U. S.] 448. Consequently, as a literary composition and its authorship are distinguishable, wherever it may exist, the first objection fails.
The second objection, of its abstractly incorporeal nature, would not. independently of the first objection, render the composition incapable of being the subject of proprietorship. In proof that rights not less abstractly incorporeal may be proprietary, the case of an option, or a turn of an advowson, has been instanced. 1 W. Bl. 338. The doctrine of the Roman jurists and modern civilians, that a sale and purchase may be valid, though the subject of it has no physical existence, has been followed in English equitable jurisprudence. Ff. 18, 1, 8, § 1; Poth. Vente, 6; Merl. Repert. Vente, § i, art. i., ii.; 8 Price, 269, note; 1 Jac. & W. 262; 1 Hare, 556, 557, cited [Pennock v. Coe] 23 How. [64 U. S.] 129; 1 Mylne & K. 488, affirming 4 Sim. 524. The subject, according to the civilians, may be a simple expectation, or a chance. Examples of the sale of the draught of a net, or of a shot at game, are followed by the remark, that when the seine is drawn or the arrow sent, the price becomes due, though