Wilson's on Bannockburn (1819) record the same sett with blue changed to purple. Logan calls the colour "corbeau" which is in fact a dark shade of green. The pattern shows a marked similarity to the Gunn tartan in all but colour, suggesting a territorial origin for both. Recently historians of Scottish dress have tended to stress the geographical sources, rather than the clan associations of the earliest Highland tartans. A sample was signed and sealed by the Chief of The Highland Society of London in 1816. The sett is known as the Green Mackay.