Milton's two masks, _Arcades_ and _Comus_, were written for members of the same noble family, the former in honour of the Countess Dowager of Derby, and the latter in honour of John, first Earl of Bridgewater, who was both her stepson and son-in-law. This two-fold relation arose from the fact that the Earl was the son of Viscount Brackley, the Countess's second husband, and had himself married Lady Frances Stanley, a daughter of the Countess by her first husband, the fifth Earl of Derby. Amongst the children of the Earl of Bridgewater were three who took important parts in the representation of _Comus_--Alice, the youngest daughter, then about fourteen years of age, who appeared as _The Lady_; John, Viscount Brackley, who took the part of the _Elder Brother_, and Thomas Egerton, who appeared as the _Second Brother_. We do not know who acted the parts of _Comus_ and _Sabrina_, but the part of the _Attendant Spirit_ was taken by Henry Lawes, "gentleman of the Chapel Royal, and one of His Majesty's private musicians." The Earl's children were his pupils, and the mask was naturally produced under his direction. Milton's friendship with Lawes is shown by the sonnet which the poet addressed to the musician:
Harry, whose tuneful and well measur'd song First taught our English music how to span Words with just note and accent, not to scan With Midas' ears, committing short and long; Thy worth and skill exempts thee from the throng, With praise enough for Envy to look wan; To after age thou shalt be writ the man, That with smooth air could'st humour best our tongue. Thou honour'st Verse, and Verse must lend her wing To honour thee, the priest of Phoebus' quire, That tun'st their happiest lines in hymn, or story. Dante shall give Fame leave to set thee higher Than his Casella, who he woo'd to sing, Met in the milder shades of Purgatory.
We must remember also that it was to Lawes that Milton's _Comus_ owed its first publication, and, as we see from the dedication prefixed to the text, that he was justly proud of his share in its first representation.
Such were the persons who appeared in Milton's mask; they are few in number, and the plan of the piece is correspondingly simple. There are three scenes which may be briefly characterised thus: