Notes:
What did all this trickery buy us? For comparison, today we would simply write the code on the right side and wind up with the compiled code like this. This code takes up about 5 times the number of bytes - which is OK since my laptop machine here has two hundred thousand times more RAM memory than the Gier, so I am still ahead by a factor of 40,000. But 5 times more memory would have made Gier Algol unaffordable at the time.