I was also interested to see discussion above of that other great highland accessory- the beard.
I do wish these would come back into fashion! I've seen it written that the tradition amongst Highlanders was to be clean-shaven, but it also seems that (during the Victorian era, at least) beards were very much en-vogue. I personally think a prodigious amount of facial hair adds a gruffness/manliness to the entire ensemble that makes it 10 times more appealing.

That is a pretty amazing looking. Man if I ever win the lottery I know that I would love to have the complete set in a few tartans. Thanks for sharing this photo.
I know there's a good tradition in wearing that much tartan, but to me it's simply too much. I may be crucified for this opinion, but it borders on absurd-looking to me with such a bright/bold tartan, and in such broad expanses of area. In older portraits (mainly from Jacobite times) it seems to look more appropriate, though, and I suppose this is because the tartans were more complex, and the pattern was 'broken up' by the wearing of a plaid.

Is he also holding a matching tartan bonnet of some sort in his hand?