Henry de Percy, 1st Baron Percy the commissioning of Warwolf, a giant trebuchet which flattened the curtain walls. The defenders had tried to surrender four days earlier, but had been made to wait by the king while he tried out his new toy. In September 1305 the first joint English and Scottish parliament met at Westminster to agree a constitution for the unified state, with Percy playing a leading role in the negotiations, but Robert Bruce, a leading representative of the Scots, was already conspiring to rebel. On 25 March 1306 Robert Bruce was crowned King of Scotland at Scone Abbey, upon which Edward confiscated his
Scots language mainly for geographical and cultural features, such as "ceilidh", "loch" and "clan". From the thirteenth century, the Early Scots language spread further into Scotland via the burghs, which were proto-urban institutions first established by King David I. In the fourteenth century Scotland, the growth in prestige of Early Scots and the complementary decline of French, made Scots the prestige dialect of most of eastern Scotland. By the sixteenth century Middle Scots had established orthographic and literary norms largely independent of those developing in England. From 1610 to the 1690s during the Plantation of Ulster some 200,000 Scots-speaking Lowlanders settled in