Ahh I see. Way before my time I guess... However that phrase still gave me the creeps when read in the middle of the night. In fact I think this concept of shadows lurking was used to good effect for the character of Voldemort.... And I guess in any scary movie where the villian (Dracula or whatever) appears suddenly from the shadows...haha.
good morning and who knows? Perhaps more obscure than yours but with the same nostalgia of the good old days, especially in economic terms let me ask a shadow question from 1957: