THE old district of Mar was very extensive. It commenced in the neighbourhood of Aberdeen, and extended to the border of Badenoch, comprising nearly the whole of the valleys of the Dee and Don and the territory lying between them. As mentioned in the Introduction, in Celtic times the Mormear was the ruler of the tribe of the land; and the old Earls of Mar were descended from the Celtic Mormears, and can be traced from the tenth century onward.