The passage is a bit longer, and in some places narrower, than he expected. Apparently the light he saw was reflected and refracted by tiny gemstones embedded in the walls. However, it grows brighter, more glowing and gently tinted, until he finds himself in a spot that he is just a bit too wide to fit through. But what he can see on the other side...

He does gasp.

"England, please tell me if nothing else you can magic some of this fucking rock out of the way."