Orpheus he went (as poets tell)
To fetch Euridice from hell;
And had her; but it was upon
This short, but strict, condition:
Backward he should not looke while he
Led her through hell's obscuritie.
But ah! it happened as he made
His passage through that dreadful shade,
Revolve he did his loving eye,
For gentle feare, or jelousie,
And looking back, that look did sever
Him and Euridice forever.
--Robert Herrick