Webster, John, 1580?-1625? The Duchess of Malfi, / [electronic resource] / John Webster ; edited by John Russell Brown.. — London : : Methuen,, 1964.. — xxii, 220 p. ; 21 cm. - The Revels plays.
"O, let us howl, some heavy note' ... Commentary and transcription [for voice and keyboard instrument] by David Greer": p. 210-213.