It is the method of trial in which laymen selected by lot ascertain under the guidance of a Judge the truth in questions of fact arising either in a civil litigation or in a criminal process.
That statement correctly draws attention to the representative character of a jury and to the fact-finding function which a jury traditionally served in civil litigation and in criminal committal and trial processes. It does not, however, attempt to address the more particular question of what, if any, are the minimum requirements which must be observed to ensure that a jury in a criminal trial is adequately representative of the community. It would, for example, be surprising if s. 80's guarantee that the trial on indictment of an offence against a law of the Commonwealth shall be by jury were satisfied by a "jury" of two persons selected by lot from a panel of half a dozen "laymen" nominated by the Director of Public Prosecutions. More importantly for present purposes, O'Connor J.'s comments do not attempt to address the question whether there are implicit in s. 80's insistence upon trial by jury some minimum requirements about the process by which a jury reaches a verdict of guilty. It is, for example, clear that, at the time of the adoption of the Constitution, it had long been an essential attribute of the institution of trial by jury that the function of the criminal jury was to determine guilt or innocence on the evidence led at the trial and not on personal pre-knowledge or prejudgment [2] . It had also long been settled under the common law that a verdict of guilty could only be returned by a criminal jury by the agreement or consensus of all the jurors.
1. See, generally, Castles, An Australian Legal History (1982); Evatt, The Jury System in Australia, Australian Law Journal, vol. 10 (1936) (Supp.) 49.
2. Williams v. Florida (1970), 399 U.S. 78, at p. 125, per Harlan J., concurring in the result: "The right to a trial by jury has no enduring meaning apart from historical form."; Story, Commentaries on the Constitution of the United States, 5th ed. (1891), vol. 2, s1779; Re B.C. Motor Vehicle Act , [1985] 2 S.C.R. 486, at pp. 512-513.
3. (1915) 20 C.L.R. 315, at p. 323.
4. (1909) 8 C.L.R. 330, at p. 375.
5. See, e.g., Stone, Evidence - Its History and Policies (rev. Wells) (1991), pp. 16-23; Williams, The Proof of Guilt, 3rd ed. (1963), p. 5; Windeyer, Lectures on Legal History, 2nd ed. (1949), p. 66.