State v. Newcomb
In State v. Newcomb, 58 Wash. 414, 418, 109 P. 355 (1910), the Court traced the lineage of the manner of jury selection, and noted that the "rule was gradually changed until the law was satisfied if the jury was returned from any part of the county; and the words 'jury of the county,' as used in our constitution, have never been held to mean more than that the jurors, when summoned, should come from some part of the county."
Furthermore, Newcomb held that "there is no method provided for in the constitution for summoning jurors, nor does it attempt to define their qualifications. Hence such matters can be safely and properly left to legislative enactment." (Id. at 420.)