An earworm...

[erinellii]

> Iggy here:
> 
> For some reason, the address "16 Charing Cross Rd" in London popped 
into my head a couple of days ago and my brain won't let it go until 
I figure out why.  Since I've had no success yet, I'd like to ask all 
of you if anyone knows what's at that address, if anyone knows, and 
if anyone can help me figure out why it popped into my head...

Erin:
Well, this is no help probably, but I also recognize Charing Cross 
Rd.  Not sure about the 16.  Is it something from HP?  Where is the 
Ministry of Magic?  St. Mungos?  Darn, now I have to look this stuff 
up...

Erin