Varient‘s available for Colquhoun:
About This Tartan
The Sobieski Brothers claimed ancient authenticity for the setts published in the Vestiarium Scoticum. It seems more likely that the slight difference from the normal pattern, is the result of a transcription error and the sett was in fact copied from 'The Scottish Gael' published only eleven years earlier, in 1831, or an intentional alteration to add mystery to the deception.