On the obligations of this oath, the essay says:"If it be asked how, or in what manner, the (grand) juries shall inquire, the answer is ready, according to the best of their understandings. They only, not the judges, are sworn to search diligently to find out all treasons, &c;., within their charge, and they must and ought to use their own discretion in the way and manner of their inquiry. No directions can legally be imposed upon there by any court or judges; an honest jury will thankfully accept good advice from judges, as their assistants; but they are bound by their oaths to present the truth, the whole truth, and nothing but the truth, to the best of their own, not the judge's, knowledge. Neither can they, without breach of that oath, resign their consciences, or blindly submit to the dictates of others; and therefore ought to receive or reject such advices, as they judge them good or bad. * *Nothing can be more plain and express than the words of the oath are to this purpose. The jurors need not search the law books, nor tumble over heaps of old records, for the explanation of them. Our greatest lawyers may from hence learn more certainly our ancient law in this case, than from all the books in their studies. The language wherein the oath is penned is known and understood by every man, and the words in it have the same signification as they have wheresoever else they are used. The judges, without assuming to themselves a legislative power, cannot put a new sense upon them, other than according to their genuine, common meaning. They cannot magisterially impose their opinions upon the jury, and make them forsake the direct words of their oath, to pursue their glosses. The grand inquest are bound to observe alike strictly every part of their oath, and to use all just and proper ways which may enable them to perform it; otherwise it were to say, that after men had sworn to inquire diligently after the truth, according to the best of their knowledge, they were bound to forsake all the natural and proper means which their understandings suggest for the discovery of it, if it be commanded by the judges." Lord Somers' Essay on Grand Juries, p. 88. What is here said so plainly and forcibly of the oath and obligations of grand juries, is equally applicable to the oath and obligations of petit juries. In both cases the simple oaths of the jurors, and not the instructions of the judges, nor the statutes of kings nor legislatures, are their legal guides to their duties. [26] SECTION IV. The Right of Juries to fix the Sentence.