"Or reason calmly of your grievances."
'Or' for and, as Capell also saw.
"Will you pluck your sword out of his pilcher by the ears?"
Singer reads pitcher. I think the right word is pilche, a leathern coat. In v. 1 the sheath of a dagger is termed its house.
"This day's black fate on more days doth depend."
We should perhaps transpose, and read "On this day's," etc.
"O prince! O [cousin] husband! O, the blood is spilled."