I'm assuming you already knew about that area prior to finding it, or I'm calling shenanigans
Nope. Didn't have a clue. I was just tooling around in the black castle, trying to find an easier/quicker way from one side to another. Just exploring every nook and cranny I could get into. All of the sudden I hear the 'picked up object' noise. I'm like 'wha?'. I get real close up to the TV and see this tiny little dot thing I could carry around. I'm like 'cool!'
Earlier (maybe later, I can't remember) I noticed that when you get a lot of objects in one screen, they would all start to 'blink'. So I got every object I could get my 'hands' on. Took me a while monkeying w/the magnet lol. Even lured the dragons into the same screen to kill them. Then just noticed the 'barrier' thingee was gone (or blinking, it's been so long I can't remember), so I went thru it and saw some dudes name (Rob something something).
Like I said, this was a long time ago (late 70's I think). I have it on an emulator. I should fire it up again just because lol.