He is no god, Carter, or even a being on par with those he occasionally thwarts or aids. But he has his abilities, and his ways of knowing.

And so it is that whenever Hastur comes, be it a minute or five thousand years after his release from pale humanity, the Great Old One will find the door unlocked for him, the Elder Signs and the wards carefully hidden and adjusted... and a fresh pot of tea brewing, two cups beside it.