The only reference of "Pieffe R Grasse" (in fact the exacy reference you are citing) on the internet is on a site named
www.catholiceducation.org/ !!!
I think the name is probably Pierre rather than Pieffe. Let me dig up some more.
ADD:
OK his actual name is Pierre P. Grasse.
Edited on, March 30, 2005, 4:10 AM GMT, by Arnab.