upon his heritage and lands in the most suitable place, of stone and lime, containing three score foot of the square, one ell thick and six ells high, for the protection and defence of him, his tenants and their goods in troublesome times, with a tower in the same for himself if he thinks it expedient."

Places which had barmkins include Halton Castle, Cheshire, Smailholm Tower, Scottish Borders, and Crichton Castle,