Esta postagem do blog diz que linha original, em Mort de Pratchett, é
He remembered being summoned into reluctant existence at the moment the first creature lived, in the certain knowledge he would outlive life until the last being in the universe passed to its reward, when it would then be his job, figuratively speaking, to put the chairs on the tables and turn all the lights off.
A versão de Gaiman (de "Façade", coletada em The Sandman: Dream Country ) é
"When the first living thing existed, I was there, waiting. When the last living thing dies, my job will be finished. I’ll put the chairs on the tables, turn out the lights and lock the universe behind me when I leave."
Meus livros estão em caixas, então não posso confirmar as citações. : (