Enter to him Merlin, with a Vial in his Hand; and Arthur.

Merlin: Well hast thou wrought thy safety with thy wit,
My Philidel; go meritorious on.
Me other work requires, to view the wood,
And learn to make the dire enchantments void.
Mean time, attend king Arthur, in my room;
Shew him his love, and with these sovereign drops
Restore her sight

Dryden's King Arthur, Act III, Scene II