[25.] noise. A company of musicians under a leader. Used in this sense by both Shakespeare and Ben Jonson.
[26.] close. Cadence. See Dryden, "Fables":
"At every close she made, th' attending throng
Replied, and bore the burden of the song."
[27.] hollow round. The sphere in which the moon has its motion. See notes [9] and [34].
Cynthia. The moon. In the ancient mythology applied to Artemis, from Mount Cynthus in the island of Delos, her birthplace.
[28.] its. In all his poetry, Milton uses this word only three times. The other examples are in "Paradise Lost," I, 254, and IV, 814. This possessive form of the pronoun it was never used until the time of Shakespeare, who employs it five times in "A Winter's Tale," and once in "Measure for Measure"; it does not occur anywhere in the authorized version of the Bible.
[29.] Why are the Cherubim "helmed," while the Seraphim are "sworded"? Addison says, "Some of the rabbins tell us that the cherubims are a set of angels who know most, and the seraphims a set of angels who love most." Observe that the plural of cherub or of seraph may be formed in three ways: viz. cherubs, cherubim, cherubims; seraphs, seraphim, seraphims.
[30.] unexpressive. Inexpressible. See Shakespeare, "As You Like It":
"The fair, the chaste, the unexpressive she."
Also Milton, "Lycidas," 176: