Fred. Thy Sister!
Cur. Yes, think of it well,
A Lady of as pure and noble Blood,
As that of the great Duke thy Father,
Till you, bad Man, infected it.
—Say, should I murder you for this base Action,
Would you not call it a true Sacrifice?
And would not Heaven and Earth forgive it too?
Fred. No, had I known that she had been thy Sister,
I had receiv’d her as a Gift from Heaven;