Hello from Canada.

Thought the photo bugs among you may be able to help me out.

I've been researching Caithness history, a truly fascinating place.
In my investigations I came across the Cairn of Mey, in the field just west of the Castle.
This is the only picture I can find.

I'm looking for info on the monument, detailed pictures, descriptions, inscriptions in the stone etc.
Also trying to determine who put it there and when.

Can anyone over there in Caithness shed some light on what this is?
Thanks for any help you can provide.