MAP OF New Hartley & Delaval Hall 1920 Northumberland Sheet 78.15 NEW
Northumberland 81.06 New Hartley & Delaval Hall 1896 – published 1989; intro by Alan Godfrey. Northumberland 78.15 New Hartley & Delaval Hall 1920 – published 2023; intro by Alan Godfrey.