Here are links to some primary sources for the research paper topics:
1. First Crusade in Jerusalem, 1099:
Gesta francorum (“The Deeds of the Franks”), The siege of Jerusalem, 1099
Fulk of Chartres, The capture of Jerusalem, 1099
The siege and capture of Jerusalem, 1099: Collected accounts
Two Muslim accounts of the conquest of Jerusalem by the Franks, AH 492 [AD 1099]
2. England in 1215:
John’s concession of England to Pope Innocent III, 1213
Roger of Wendover: The battle of Bouvines, 1214
William the Breton (chaplain to Philip Augustus): The battle of Bouvines, 1214
Roger of Wendover: Runnymede, 1215
Photographs of Rochester Castle (besieged by John in 1215) [Only the photographs of the castle itself, not the text of this web site, can be used as a primary source]
3. Inquisition in S. France, 1300-1320:
Translations from the Inquisition Register of Jacques Fournier (Be sure to read Prof. Nancy P. Stork’s notes on Bishop Fournier himself)
Bernard Gui: On the Albigensians
Bernard Gui: Inquisitorial technique
Collection of sources on heresy and inquisition in S. France in the early fourteenth century
(I have put another copy of this site here)
4. Black Death in Paris:
Six accounts of the pestilence in France (including Paris), Italy, and England
Report of the medical faculty of the University of Paris, 1348