 This ancient passage specifically connected the River Dee crossing (where the present Bridge of Dee is situated) via Portlethen Moss, Muchalls Castle and Stonehaven to the south.The route was that taken by William Keith, 7th Earl Marischal and the Marquess of Montrose when they led a Covenanter army of 9000 men in the battle of the Civil War in 1639.From the industrial era of the 19th century there are some relics of old manufacturing equipment such as a circular-section brick chimney on a square stone base, serving a small single-storey engine and boiler house at an old smithy in Cammachmore.