Her article in thepeerage is here.
The criss-crossed blue ribbon a white background could be interpreted as a series of St. Andrew's crosses. Bonnie Prince Charlie's rebel force headed south through England in 1745, ran out of steam, and retreated. It was effectively defeated at Culloden moor where wounded rebels became dead rebels at the hands of the Hanoverian forces. Patriotism could be extremely hazardous to a Jacobite's health.