"Toad that under cold stone."
A syllable is lost. Pope read 'the cold'; Steevens 'coldest.' I read 'underneath,' as in Jonson's line, "Underneath this stone doth lie."
"Rebellious head rise never."
This is Theobald's reading for dead of the folio. Hanmer reads 'Rebellions,' which may be right, but 'head,' often means insurrectionary forces.
Sc. 2.
"But cruel are the times when we are traitors
And do not know it ourselves."