Poem "Epestrefe / Come back" from C.P. Kavafis (~1912) written on a piece of seaweed:
Come back often and take hold of me, sensation that I love, come back and take hold of me -- when the body's memory revives and an old longing again passes through the blood, when lips and skin remember and hands feel as though they touch again.
Come back often, take hold of me in the night when lips and skin remember...
Please, note that the color of this specific kind of seaweed slightly changes through the years, becoming lighter.