Thanks for a very interesting post over at Risus Monkey - be sure and read this today!
This in particular caught my eye, which appears to be a house rule, or even clarification, for Magic Users and Clerics (I'm guessing for OD&D per the combat tables) suggested by Gygax:
"The "Spells Table" gives the maximum number of times a Magic User or Cleric can cast spells of the indicated levels during an expedition. This means that a third level MU (conjurer) can cast one second level spell once and three first level spells once (or one first level spell three times). The particular spells need not be selected in advance, but can be chosen during the expedition as circumstances require. This will balance the game more and will make the expeditions even more interesting."
As this is apparently from the mid-70's, its an interesting example of how fluidly Gygax approached OD&D, which is very different from the attitudes he seemed to express by the time AD&D was ascending.
Makes one wonder: what changed?
Or were they simply appropriately different opinions for different versions of D&D?
Cool houserule, at any rate, and would be great for open games with lots of new/circulating players.