Texts Relevant to Some Historical Events of Chaucer's Time
For some excellent collections of source texts see:
Paul Halsall's Internet Medieval Source Book
ORB, The On-line Reference Book, edited by Kathryn Talaricor.
To find other useful sites go to NetSerf, The internet connection for medieval sources
On the Plague, see:
The ORB Page on The Black Death
Boccaccio's account of the Plague in Florence.
On the Peasants' revolt see:
The Literature of Richard II's Reign and the Peasants' Revolt Edited by James M. Dean. This is on the TEAMS site, another very useful collection of texts (mainly literary).
Anonimalle Chronicle (an account of Wat Tyler).
Gray's Scalacronica(an account of Wat Tyler)
The Brut or Chronicle of England, an account of Jack Straw's rebellion.
Some other related topics:
Jean Froissart, on the Jacquerie, 1358.
Jean Froissart, on the Hundred Years War (1337-1453).