Cobble Crawl

YOU ARE CRAWLING OVER COBBLES IN A LOW PASSAGE. THERE IS A DIM LIGHT AT THE EAST END OF THE PASSAGE. THERE IS A SMALL WICKER CAGE DISCARDED NEARBY.

There is a small yellow bird in the cave who can kill a snake. You will need the cage to capture the bird.

From here:

You can go back below the grate. Or to the debris room. Or past the debris room to a pit.