[Quarterbore]

Relevant other info:

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter17.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter20.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter21.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter38.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter48.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter54.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter66.txt

http://www-2.cs.cmu.edu/afs/cs/user/...f_letter67.txt

http://www-2.cs.cmu.edu/afs/cs/user/...st/rr_5734.txt