The earliest records of parliament, up to the sixteenth century, are known as the Rolls of Parliament. The Rolls of Parliament cover the reigns of Edward I to Henry VII (1278-1509**) and are available in sixteen volumes. They are available under the title The Parliament Rolls of Medieval England from St. Louis University via MOBIUS loan.
Ellis Library also has many volumes related to Parliament in print, either in the stacks (DA 25 call numbers, 3rd floor) and in the Depository. To browse online, go to the MERLIN catalog and search by Library of Congress Call Number.
**Note: The Rolls end at 1504 because Henry VII did not call a Parliament during the last 5 years of his reign.