What is the subject of a participial phrase?

Question

But the hand which I now saw, clearly enough, in the yellow light of a mid-London morning, lying half shut on the bedclothes, was lean, corded, knuckly, of a dusky pallor and thickly shaded with a swart growth of hair.

This is from the classic novel Strange Case of Dr. Jekyll and Mr. Hyde. I wonder what was lying half shut on the bedclothes. Was it a hand or speaker itself?

Answer 1

It was the hand.

There is technically some ambiguity, but we do not talk of people lying half shut, or for that matter parts of the day - a mid-London morning might just as well have been modified by lying half shut.