You can obtain a copy of Carl Olof Jonsson's refutation of Philip Couture's treatise at:
http://au.geocities.com/doug_mason1940/Coutures_treatise_refuted.pdf
(See note 53 in version 4 of Carl's book Gentile Times Revisited, p. 310.)
I would be very very greatful if someone could provide me with a clear copy of Couture's treatise.
Doug