I know in my personal gaming history, scrolls were nearly always spell scrolls. Even though over a third of random scrolls results in BX (using the Cook table) are protection scrolls, I don't think one of these ever came up when I was younger. After coming back to the fold via Labyrinth Lord years ago, I've placed them deliberately now and then, but I don't remember one getting used in play. Now the interesting thing about that is the "in melee" part. Moldvay specifies "hand to hand." That could be interpreted as spells and missile fire being OK. If so, that makes that Protect from Undead scroll very nice indeed, as it seems undead are much more common than weres in most games (especially lower levels). 

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