Edith Nesbit - At Parting

Go, since you must, but, Dearest, know
That, Honour having bid you go,
Your honour, if your life be spent,
Shall have a costly monument.

This heart, that fire and roses is
Beneath the magic of your kiss,
Shall turn to marble if you die
And be your deathless effigy.

Edith Nesbit

http://www.poemhunter.com/poem/at-parting-2/