Waiting For Macbeth

Seyton: sculpture mix; dark green, transparent brown, and celadon glazing.

"Seyton!"

I'm thinking of a particular speech from Shakespeare's Macbeth: 
V.III. 23-34.  (Seyton is Macbeth's retainer and body-servant.)

Long ago, I wrote what I felt was a successful piece explicating Lord Byron's use of this same passage in his own masterpiece Don Juan.  I should hunt up those old words and see if there's any validity still there.  In the interim, I'll reread that piece from the Scottish play.