"the which" in early literature

I’d like to know what "the which" in the following passages refers to. While the "the which" in the second instance clearly refers to the large parlour, that in the first is quite unclear, even dubious on grammatical grounds.

The fearful passage of their death-marked love,

And the continuance of their parents’ rage,

Which, but their children’s end, naught could remove,

Is now the two hours’ traffic of our stage;

The which if you with patient ears attend,

What here shall miss, our toil shall strive to mend.

(From Romeo and Juliet)

Then he took him by the hand, and led him into a very large parlour that was full of dust, because never swept ; the which, after he had reviewed a little while, the Interpreter called for a man to sweep.

(from The Pilgrim’s Progress)