More Edinburgh Graffitti...

Found another S.H.E.I.L.D. The other one was my 8th blip, I pass it everyday on my way to work. A friend has told me it has something to do with the guy that runs the comic shop on the street down from the Grey Friar Bobbie statue.

Sibs at Focus has told me that he has some answers/information on it and was going to send it to me but he didn't get round to it.

This one is on the street clock just outside the Usher Hall on Lothian Road. Anybody shed any light?