I'm having trouble with the phrase 'Rents of coterels by the year' in the Cartulary of Ramsey Abbey. I believe the rental amount of 'duo solidi, sex denarii; duo altilia' to be in modern terms '2s 6d and 2 chickens (?)' but I don't know what a coterel is. I didn't come up with anything with google or an online dictionary. Perhaps it's the spelling. Also as this is a book of charters to the abbey, would this be a grant of the income from a coterel that the donor owns or is this rental that he is paying for a coterel that the abbey owns? Whatever a coterel is. Thanks.