My GGrandfather, Matthew Irving built the Barhead (Grist) Mill in 1855-56. I have a copy of an article written for the local paper in 1936 by Isabel Cunningham Ritchie, Matthew's neice. There is also one in "Markdale and Flesherton, A Written History" 1979. Although Matthew and his wife came to Canada from Ireland(1852) the Barhead is said to have been named for Barhead, Scotland.