An interesting side note: the Xerox Lisp Emulator - an emulator developed by Xerox for their Interlisp machines - is included as part of the Grammars Writer Workbench. I still have a set of Medley Lisp floppies lying around at home - and two Xerox Lisp machines sitting in the corner. Nice devices with a neat graphical system. Ok, far from the performance of a Symbolics, but since they were my first Lisp machines, I like them anyway somehow.
Included with the Xerox files are emulators for DOS, Linux, SunOS and Solaris. So I might have a chance to get my old Medley Sysouts running on Linux.
Somewhere in there is also the Medley Common Lisp - so not just the Interlisp-D, which is somewhat archaic compared to more modern Lisps (for example, it only has dynamic scope). However, I would first need to dust off my old Interlisp-D knowledge to figure out how to open a Common Lisp listener on the machine again, if it's not in the root menu...
I found the original article at Planet Lisp.