Round about 1965, Stan Lee typed up descriptions of all of the major Marvel characters into a sort of a bible, for use in selling the Marvel Super-Heroes cartoon and other licensing opportunities.
This is Stan’s page on Spider-Man. It would have been written right before Steve Ditko left the strip, and Peter Parker had begun to go to college.
More about these documents here:
http://www.scottedelman.com/2012/02/22/stanlee/