M.F.S. office
From Jenny Everywhere Wiki
The M.F.S. office was the building which served as the headquarters of the Multidimensional Finders Service, bought by the Man in Grey in Jenny Over-There's home universe. (PROSE: The Tribulations of Jenny Over-There) It was located in the middle of Wales. The interior, having been designed by the Man in Grey, was uniformly grey. (PROSE: Open Sourcing)