 The letters of Sir David Cunningham of Auchenharvie to his cousin the laird of Robertland preserved in the National Archives of Scotland detail his efforts to purchase some of these lands (NAS GD237/25/1-4) He sold some of them in turn to James Douglas of Chesters in 1642 (RGS, ix, (1634–1651), no.1189) In 1691 the Hearth Tax records show the Lands of Crivoch with twelve families and the largest dwelling, that of Mistress Miller, possessing four.In around 1700 John Somerville of the Kennox Estate in Lanarkshire purchased the Bollingshaw (now Bonshaw) Barony and built Kennox House (also Kenox in 1832 and Kennoch in 1792) on the lands of Montgomerie - Crevoch.John Somerville married Janet, eldest daughter and heiress of Alexander Montgomerie of Assloss House (previously Aslois, Sloss or Asloace) near Kilmarnock.