Steevens read approved, Singer appayed. The poet probably wrote has, pronounced as, of which the printer made 'is.'
Sc. 4.
"My birth-place have I, and my love's upon."
With Steevens, I read hate for 'have.' This change of adjacent letters is a common error with printers.
Sc. 5.
"All-noble Marcius. Let me entwine
Mine arms about that body."