Cambyses is by Thomas Preston and predates Hamlet; it's pretty much the textbook example of Why It Is A Bad Idea To Write A Play in Fourteeners. (Agathon, he whose counsel wise to princes' weal extended, / By good advice unto a prince three things he hath commended: / First is that he hath good government and ruleth over men; / Secondly, to rule with laws, eke justice, saith he then; / Thirdly, that he must well conceive he may not always reign. / Lo, thus the rule unto a prince Agathon squared plain.)