Count from an offset plaid length, probably Wilsons' C.1820, at Blair Castle. Roughly 4 yards long x 27" wide selvedge to selvedge at 84 epi with 2" wide K herringbone selvedge mark. Tartan Society notes say 'Piper's plaid & kilt circa 1914' seen in Scottish Horse Regimental Museum, Dunkeld (now closed - 2002).