Thank you for the fascinating replies!
It sounds, then, like the 1st printing has this information under wizards:
1. their combat capability (including that they can become invisible until they attack and can see in darkness).
2. missiles (fire ball and lightning bolt)
3. spells (phantasmal forces, darkness, wizard light, detection, concealment, and conjuration of an elemental)
4. a note saying that wizards must be stationary and undisturbed to cast a spell.
And that's it.
The later printings add:
1. several spells
2. number of spells castable by wizards (6-7), sorcerers (5), warlocks (4), magicians (3), and seers (1)
3. spell distances (24" for seers, 36" for magicians, etc.)
4. moral ratings and point values for the five different grades of spell-casters
5. spell complexity chart