'I heard the bells jingle at the back of the stand, and a red leg waved over it; then a black one. So, very slowly, Rahere the King's jester straddled the edge of the planks, and looked down on us, rubbing his chin. Loose-knit, with cropped hair, and a sad priest's face, under his cockscomb cap, that he could twist like a strip of wet leather. His eyes were hollow-set.
This is from "Simple Simon" in "Rewards and Fairies" by Kipling.
I do not understand the meaning of below.
What does "loose-knit" mean here?
His eyes were hollow-set.
I am so glad if somebody kindly teach me.