Note 2777 — Scene II. London. The palace.[2726]
Reading edition
if ... perform,] Qq (performe: Q1 Q2 Q3. performe. Q7 Q8). if I performe, and doe survive, F1. if I promise, and doe survive, F2 F3 F4. if I perform't and do survive, Hanmer. my promise if I do survive Long MS.
perform] perform it Keightley conj.