"Yet are the King's; and till my soul forsake."
We may, with Rowe, read 'forsake me' making 'vows and prayers' the subj. to 'Shall cry'; but a line may have been lost, as 'my soul' is a more suitable subj. to 'cry.'
Sc. 2.
"I know your Majesty has always lov'd her
So dear in heart, not to deny her that."
It would seem that 'So' should be Too; but then the negative may make a difficulty. 'Not' is, as not.