Gargoyle: a "wappinschaw" [variously spelt] is a show of weapons, a get-together of a clan or district, armed to the teeth, where they showed off their weaponry and had contests [rifle-shooting and what have you].

The IRA song, which is interesting, seems to be the one Ferret was after. But there's quite a few others as you see above. Burns has a song in the Scots Musical Museum set to the tune "The Black Watch" [Gaelic An freiceadan dubh], namely "When Guilford good". The tune is also called "The Earl of Glencairn's Strathspey".