Here are responses received on the question of sarum chant sources.


***
The English Hymnal is good for hymns;
for fancier chants, I use "The Order of Vespers", probably out of print.

***
We've performed things from Oxford University Press New Oxford Book of
Carols. Running a search in Google (e.g., sarum chant "Oxford University
Press") yielded this site:
http://www.columbia.edu/cu/sarum/sources.html

***

look at our very simple website and see what we do:

http://www.columbia.edu/compline

We sing only Compline, and occasionally Vespers, and that means that we
don't do many of the more elaborate chants that are used for the Mass or
Matins. Our only elaborate-ish ones are the Marian antiphons at the end
of Compline, and a Responsory for Vespers. I should explain say that in
general a Sarum chant is not all that different from its Roman equivalent.
The difference isn't as great as that between Roman and Mozarabic, or
Roman and Milanese.

Paul Meers
pm05(a)aub.edu.lb