radman:
I believe VALGOL is a derivative of LAIDBACK which was developed at the Marin County Center for T'ai Chi,
Mellowness, and Computer Programming.LAIDBACK responded to syntax errors with the message,
SORRY MAN, I CAN'T DEAL WITH THAT.
Hey, you making fun about my born and raised home county, second generation? 
I did move across a bridge from there 20 years ago, but my daughters and grand-kids still live there (3rd and 4th generation born there). It's really is a most wonderful place to live if you can afford the housing.
Lefty