Upon recovering from a life-threatening illness, Donne in 1623 wrote Devotions upon Emergent Occasions, the most enduring of his prose works. Each of its 23 devotions consists of a meditation, an expostulation, and a prayer, all occasioned by some event in Donne’s illness, such as the arrival of the king’s personal physician or the application of pigeons to draw vapours from Donne’s head.