You ignore Beejuice, who looks a little put out, and walk up to the chink.
As you approach you can see that it leads to a very small passageway - almost a tunnel - which before long seems to open up into a secret alcove where a softly glowing vaguely purple light is visible.
Judging the situation astutely, you think you've got a pretty good chance of fitting through the tunnel if you get down on your hands and knees and wriggle a bit.
As you stare beyond the chink and into the low narrow passage, you hear a cryptic warning from the goblin:
"Only go that way if the knowledge you seek is beyond that which is known in scrolls..."