In Wilson's Lectures, Vol. II., p. 72, the same doctrine is declared and illustrated; and he says:
The jury must do their duty and their whole duty. They must decide the law as well as the fact. This doctrine is peculiarly applicable to criminal cases, and from them, indeed, derives its peculiar importance.
In Forsyth's Jury Trials, after an examination of the subject, it is said, p. 265:
It can not therefore be denied that, in all criminal cases, the jury do virtually possess the power of deciding questions of law as well as of fact.
The authorities quoted from conclusively show that at the time the Constitution was adopted, and for nearly a quarter of a century afterward, juries were understood and declared to possess the right to pass upon questions of law as well as fact in all criminal cases; and this is all that need be shown to bring this right within the protection of the Constitution.
The first case it is believed in which the contrary doctrine received favor in any American court was in the case of the United States vs. Battiste, 2 Sum., 240, decided in 1835. Mr. Justice Story, in that case, said:
My opinion is that the jury are no more judges of the law in a criminal case upon the plea of not guilty than they are in every civil case tried upon the general issue. In each of these cases their verdict, when general, is necessarily compounded of law and of fact, and includes both. In each they must necessarily determine the law as well as the fact. In each they have the physical power to disregard the law as laid down to them by the court. But I deny that in any case, civil or criminal, they have the moral right to decide the law according to their own notions or pleasure.
In Commonwealth vs. Porter, 10 Met., decided in 1845, the Supreme Court of Massachusetts followed the decision in Battiste's case, and held that the jury are under a moral obligation to decide the case as instructed by the court, and the court sum up the subject as follows:
On the whole subject, the views of the court may be summarily expressed in the following propositions: That in all criminal cases it is competent for the jury, if they see fit, to decide upon all questions of fact embraced in the issue, and to refer the law arising thereon to the court in the form of a special verdict. But it is optional with the jury thus to return a special verdict or not, and it is within their legitimate province and power to return a general verdict if they see fit. In thus rendering a general verdict, the jury must necessarily pass upon the whole issue, compounded of the law and of the fact, and they may thus incidentally pass on questions of law.
