The Dink Network

In the green caves, when you go to save baby Roland, you can see (but not get to) an elixer in an area that also leads to a light sword. Now I know this in part bacause of the warp function of the cheat (ahem, I heard about it from someone, somewhere). In the walkthrough, SimonK suggests that I could access this legally by bombing something earlier. So, two questions:

1. What is that something? (I've "talked to" everything that looks bombable, I think.)

2. Is is safe to assume that, once Roland is saved and the original entrance to the green cave sealed, one can no longer bomb one's way back to that light sword?

Thanks.

1) Bomb some of the rock wall on the right hand side of the screen as you walk towards the big cavern with the blobs - they should appear out of alignment, plus you can talk to them.

2) I can't remember... probably