Re: TD 666 -- For Joseph Pehrson on schisma thirds (c. 1400)

Hello, there, and in addition to what Paul Erlich might add on this
question, I might mention this reference from a medievalist point of view:

http://www.medieval.org/emfaq/harmony/pyth4.html#5

Most respectfully,

Margo Schulter
mschulter@value.net