During our BX game last night, we had a brief discussion about spell scrolls and house rules. Generally speaking the DM "grants" the spells for a wizard thru scrolls that are found as part of treasure. What I realized is that it would be SUPER funny and entertaining to grant these spells but in a way that isn't as clear as a scroll. Here are a few examples.
1. Behind the gygaxian tapestry written on a wall
2. On a lit torch
3. On a treasure chest key
4. On the side of a healing potion bottle
5. On the back of a treasure map
6. Not on the dead wizard the PCs just defeated, but safely stored on the Wizard's hireling (likely in a backpack).
7. On a staff
8. A message in a bottle