Comment by pmcjones
16 hours ago
Try these:
https://softwarepreservation.computerhistory.org/LISP/lisp15...
https://softwarepreservation.computerhistory.org/LISP/lisp15...
https://softwarepreservation.computerhistory.org/LISP/lisp15...
(The third one includes the source code to PDP-1 Lisp.)
Wow! How did I manage to miss this treasure trove! Thank you.