I managed to accquire the 1st ed of
DMG from ebay (gotta love that place) for a nice amount (£5)
Looking through it I noticed two differences from my Wizard opening the door
DMG and they are:
Page 40, there is an illustration of a Wizard summoning a demon.
Page 119 an illustration of potion bottles.
All in the 1st but not in my later copy. The question is, in which edition did these illustrations dissapear? And why?
There may be other differences but after a long day at work I just wanna relaaax.