William Hamilton, 1751-1801
The Revelation of Olivia's Betrothal
c. 1790
Oil on Canvas 13 x 17 in. (34.5 x 43.0 com)
Courtesy of: Yale Center for British Art, Paul Mellon Collection

Act V, scene I, lines 155-159, where Olivia attempts to prove that she has just married the disguised Viola:
'Father, I charge thee, by thy reverence,
Here to unfold, though lately we intended
To keep in darkness what occasion now
Reveals before 'tis ripe, what thou dost know
Hath newly pass'd between this youth and me.