Yeah, that guy.
I'd forgotten about his sewer duty. One supposes it's where he honed his sense of humor.
The Wikipedia article is bizarre in that it makes no mention of the puns for which Spider is (in)famous. (If you google "Spider Robinson puns," the results go on forever.)
Because you are this group's resident paronomasiac, I hope you one day have the opportunity to read
Callahan's Crosstime Saloon.