Scotland's Forged Tartans

[xman]

One Highland Chief overcame this difficulty by registering the correct tartan at the Lyon Court and, at the same time, authorising the wearing of the "phoney" one.
He thus gave his Clan a correct tartan, avoided expense and annoyance for the people who already had the false one, and gave the tartan trade a chance to sell more tartan, a judgement that Solomon would be hard put to it to beat.

I wonder to which tartans this are referring.