Hector Munro, today’s clan chief, has been researching his family’s archives as part of the Lost Inverlael project.
Local historian Duncan Mackenzie said Mr Munro was transcribing “medieval gobbledegook” into something that could be more easily understood.
Mr Mackenzie said: “He is coming up with some fantastic documents, and one of the documents relates to the mill.
“In 1571 there was this cracking stramash between the Mackenzie and Munros. They had been warring for three or four years.”
The local judiciary eventually intervened and ordered the clans to Elgin in Moray explain themselves.
Mr Mackenzie said: “A big draft was written up of what each had done to the other – slaughtering and murdering, hellish work.
“There are also details of stuff stolen from Inverlael by the Mackenzies. There was a load of grain nicked off the place – about 30 tonne – and the mill was trashed at the same time.”