"Farming". The Northumberland Estates. The Northumberland Estates. Archived from the original on 21 April 2013. Retrieved 10 October 2012.
"Sawmill and Forestry". The Northumberland Estates. The Northumberland Estates. Archived from the original on 21 April 2013. Retrieved 10 October 2012.
"Farming". The Northumberland Estates. The Northumberland Estates. Archived from the original on 21 April 2013. Retrieved 10 October 2012.
"Sawmill and Forestry". The Northumberland Estates. The Northumberland Estates. Archived from the original on 21 April 2013. Retrieved 10 October 2012.