Absolutely do more research.
![[Wink]](wink.gif)
Sometimes I think that folks give "built on an ancient Indian burial ground" as a default reason for hauntings. It *surely can* be the cause, but I'd not take it for truth if it's just an office rumor.
Taking pictures is good too, if, as has been said, it's allowed in your office.
Let us know what you find out..
Kell