"And when I crumble, who will remember" - is from

The quote "And when I crumble, who will remember" is from the poem "An Epitaph" written by Walter de la Mare.

In this poem, the word 'crumble' is used as a metaphor for death. When the poet says, "And when I crumble," he is referring to the time when he himself will pass away and turn to dust. He wonders, with a sense of grief, who will remember the beautiful woman once he is dead and gone.