be explained. If any one doubts me, let him read Keller's "Der Römische Civil Process und die Actionen," a treatise on the prætor's edict, Muirhead's most interesting "Historical Introduction to the Private Law of Rome," and, to give him the best chance possible, Sohm's admirable Institutes. No. The way to gain a liberal view of your subject is not to read something else, but to get to the bottom of the subject itself. The means of doing that are, in the first place, to follow the existing body of dogma into its highest generalizations by the help of jurisprudence; next, to discover from history how it has come to be what it is; and, finally, so far as you can, to consider the ends which the several rules seek to accomplish, the reasons why those ends are desired, what is given up to gain them, and whether they are worth the price.
We have too little theory in the law rather than too much, especially on this final branch of study. When I was speaking of history, I mentioned larceny as an example to show how the law suffered from not having embodied in a clear form a rule which will accomplish its manifest purpose. In that case the trouble was due to the survival of forms coming from a time when a more limited purpose was entertained. Let me now give an example to show the practical importance, for the decision of actual cases, of understanding the reasons of the law, by taking an example from rules which, so far as I know, never have been explained or theorized about in any adequate way. I refer to statutes of limitation and the law of prescription. The end of such rules is obvious, but what is the justification for depriving a man of his rights, a pure evil as far as it goes, in consequence of the lapse of time? Sometimes the loss of evidence is referred to, but that is a secondary matter. Sometimes the desirability of peace, but why is peace more desirable after twenty years than before? It is increasingly likely to come without the aid of legislation. Sometimes it is said that, if a man neglects to enforce his rights, he cannot complain if, after a while, the law follows his example. Now if this is all that can be said about it, you probably will decide a case I am going to put, for the plaintiff; if you take the view which I shall suggest, you possibly will decide it for the defendant. A man is sued for trespass upon land, and justifies under a right of way. He proves that he has used the way openly and adversely for twenty years, but it turns out that the plaintiff had granted a license to a person whom he reasonably supposed to be the defendant's agent, although
