Find out the mystery behind the detective

"It was not exactly dark, but a kind of twilight or gloaming. There were neither windows nor candles, and he could not make out where the twilight came from, if not through the walls and roof." -Childe Rowland "The voices melted into the twilight and were mixed into the trees, and when I thought of the words they too melted away, and were mixed with the generations of men." -William Butler Yeats