Mount Keen

[R0wsOfWeeHooses]

What does that boulder just before the summit with the letter B carved on signify? Could it just be a boundary stone!

[jmarkb]

Could it just be a boundary stone!

It would appear so: it is on the old county (now regional) boundary and there are several more to the east:
http://www.geograph.org.uk/photo/115993
http://www.geograph.org.uk/photo/115994
http://www.geograph.org.uk/photo/2619037
and the west
http://www.geograph.org.uk/photo/115987

[R0wsOfWeeHooses]

What an excellent reply! Thanks for that, much appreciated.

[jmarkb]

You're very welcome!

[Jambo235]

Forgive my ignorance, but these are boundary stones for what boundary?

[Caberfeidh]

Forgive my ignorance, but these are boundary stones for what boundary?

Most likely the county boundaries between Aberdeenshire, Angus and Kincardineshire (from Kincardine O'Neil between Banchory and Ballater).
See this page for map of county boundaries: http://www.genuki.org.uk/big/sct/sct_cmap.html
So the carving is most likely Victorian in origin. Mount Keen is a corruption of the Gaelic "Munth Cean" meaning "Head of the Munth" , the Munth being the high ground between the low-lying pastoral lands of the coastal strip down to Blairgowrie (also known as The Carse o' Gowrie) and the high Cairngorms proper. An interesting wee part of the country, with some spectacular views over the lowlands of Angus and the Raspberry Prairies of lowland Perthshire.

[NickyRannoch]

there is another one half way along glen mark.

it used to be said that it was a very ill omen to tamper with boundary stones and you can find them in in fields being worked around and walls bulit around them. they were also use to delineate areas smaller thatn counties, usually the lairds estate. there are many of them around angus/ dundee/ perthshire that i have stumbled across including dundee law and kings seat over the carse of gowrie.

[RicKamila]

So what is the meaning of the numbered stones? There's one along the Firmounth Road numbered 814 in that style.