Event Comment: The Duke's Company. That this date is the premiere is conjectured from the order, dated 11 Dec. 1680, forbidding further acting of this play. See L. C. 5@144, p. 28, in Nicoll, Restoration Drama, p.1 on: Whereas I am informed that there is Acted by you a Play called Lucius Junius Brutus..wherein are very Scandalous Expressions & Reflections upon ye Government these are to require you Not to Act ye said Play again. In the Preface to Charles Gildon's The Patriot (1703) it is stated that Lee's play was banned after the third day's Acting, by the Lord Chamberlain Arlington as an anti-monarchical play." As the order is dated 11 Dec. 1680, the drama was probably presented on 8, 9, and 10 Dec. 1680.

Event Comment: Betterton's Company. The date of the premiere is not known, but the fact that the play was advertised in the Post Man, 8-10 June 1697, suggests a first performance in late May or the beginning of June. Preface: I [Motteux] write the Masque of Hercules, and Mr Eccles, having set it with his usual Success, and yet more masterly than my Mars and Venus, if possible, I prevail'd with the ingenious Mr J. Oldmixon to give me a short Pastoral, while I scribbled over a Farce after the Italian Manner, and an Imitation of part of a diverting French Comedy of one Act (for such Plays are very common in Foreign Parts). Then I wanted nothing but a Tragedy....At last I bethought myself of one already studied, called The Unnatural Brother, written by an ingenious Gentleman and acted 6 Months ago, tho not with the success it deserv'd. Yet the latter Part was extremely applauded: So I was persuaded to make bold with it, as I do....I could easily contract the most moving Part of the Story into the Compass of one Act, with some Additions....All this was done in a very short time, the warm Season threatening me with your Absence....The foregoing Lines were published as a Preface to that Masque, some few copies of which were printed for the use of the Audience, the first day of the Novelty's being Acted. A Comparison Between the Two Stages (1702), p. 20: Every Word stolen, and then Damn'd