Generally, when I'm writing stories, even Lovecraftian ones, I tend to try to avoid overt references. Throwing out names like Miskatonic or Cthulhu or whatever. But in this case, I was writing this story specifically for the Historical Lovecraft anthology, and I thought that the "that is not dead which can eternal lie" line was just so appropriate for the theme of the story that I couldn't resist using it.
Well, that answers that. Hard to write a story for a Lovecraft collection without some mention of Lovecraft. Great work!