A 'small and very rudely formed' dug-out canoe of Neolithic date was found at Seafield, Santon.  It was found while draining near Santon river, possibly on the Malew side and stored for years at glen Grenaugh, before it was moved to Castle Rushen.  Dr L.S. Garrad thought it may have been a trough for a horizontal mill or for boiling water.