Cardinal Comes of Casate, one of six cardinals who died in the papal vacancy-following the death of Honorius IV in 1287, added a codicil to his will in Rome as the summer pestilence was raging. This document, edited below, adds another example to an isolated first cluster of such cardinals' wills, codicils, and death inventories. The inventory of the estate of Cardinal Geoffrey of Alatri, deacon of S. Giorgio in Velabro (died before 31 May 1287), and the wills or codicils of Cardinals Comes, priest of SS. Marcellino e Pietro (died after 19 July 1287), Hugh of Evesham, priest of S. Lorenzo in Lucina (died before 18 August 1287), Bentivenga dei Bentivenghi, bishop of Albano (died after 25 March 1289), Peter Peregrosso of Milan, successor to the cardinal title of Geoffrey of Alatri (died between 15 and 28 July 1295), and Thomas of Ocra, priest of S. Cecilia (died between 23 May and 4 June 1300), are a remarkable group, not only because they cover a span of only fourteen years, but because they either contain an impressive list of books or refer to a substantial, uninventoried private library.