It is a great site so I don't mean to be negative - but I'm sure you'd want it all to be accurate. Killiecrankie is described as a victory for the Marquis of Dundee. I'm sure Dundee was only a Viscount so maybe here he is being mixed up with his earlier Graham namesake the "Marquess of Montrose". Rampant Scotland seems to have the same mistake. I might be wrong of course but I'm sure Claverhouse was never a Marquess.