"Hang out our banners! On the outward walls
The cry is still They come!"
So I think we should punctuate. It was from the keep, not the walls, that the banner (as perhaps we should read) was hung. We have, no doubt, "Advance our waving colours on the walls" (1 Hen. VI. i. 6); but Orleans was a city, not a mere castle.
"The time has been my senses would have cool'd."
Collier's folio, which I follow, reads quail'd for 'cool'd.' "That so to see him made her heart to quail." F. Q. iv. 3, 46.
"Gracious my lord, I shall report that which [I say]
I saw, but know not how to do't.—Well, say, sir."
'I say' is needless, and spoils the measure. It arose from 'say' in the next line.