Well I remember how you smiled
To see me write your name upon
The soft sea-sand . . . "O! what a child!
You think you're writing upon stone!"

I have since written what no tide
Shall ever wash away, what men
Unborn shall read o'er ocean wide
And find Ianthe's name again.

Walter Savage Landor

http://www.poemhunter.com/poem/well-i-remember-how-you-smiled/