1. DMO/ADD/41/4/1 Reference (shelfmark): DMO/ADD/41/4/1 Title: Coast Defence. Forms of Attack and Forms of Defence. Secret.' '(Signed) G.N. Macready, Secretary, Joint Oversea and Home Defence Committee. 2, Whitehall Gardens, S.W.1, November 23, 1927. Collection Area: Map Collections Languages: English Date Range: 1927 Extent: 1 booklet (24p.)