Yes, one of a few favourable locations. Depends on the situation, like where the Lesser Grail is, I believe. [The not knowing irks him. But the books he'd studied had only so much detail. There was barely anything on the fact that there were 'two' Grails.]

It's more like the Greater Grail is housed here, and the Lesser Grail appearing is the key to connecting to it, no matter which location you are at. But of course the closer to the actual physical location you are, the better the connection will be.

[He shrugs.] I suppose it makes sense though. Something as powerful as an omnipotent wish-granting magecraft would have to be much bigger than a cup.