He was also a prime suspect in the Appin Murder case, that inspired novels by Sir Walter Scott and Robert Louis Stevenson.
[1] In accordance with the fosterage customs of the Highland clans, Allan Stewart and his brothers grew up under the care of their relative James of the Glen in Appin.
On 14 May 1752, Colin Campbell of Glenure, the royal estate Factor collecting rents from the Stewarts of Appin and ordering evictions in an early version of the Highland Clearances, was murdered by a sniper in the wood of Duror.
As Allan Stewart had publicly threatened the life of Glenure and had enquired about his schedule for the day in question, a warrant was issued for his arrest.
Iain Ruadh Stùibhart, a covert agent for the House of Stuart government in exile and important war poet in Scottish Gaelic literature, is widely believed in some circles to have been the main model for Stevenson's fictionalized depiction of Allan Breck in the novel Kidnapped.