Note 109 — ACT I.
Reading edition
This epithet to a dolphin doth not give one so clear an idea as were to be wished; a smiling fish seeming a little more difficult to be imagined than a flying fish. Mr. Dryden is of opinion that smiling is the property of reason, and that no irrational creature can smile:
"Smiles not allow'd to beasts from reason move."—"State of Innocence."