I.S.S.B. NO. 60(I) 9. RUMOURS OF A MILITARY NATURE INTENDED TO MYSTIFY AND MISLEAD THE ENEMY, SUBMITTED THROUGH THE INTER-SERVICES SECURITY BOARD, FOR THE WEEK ENDING 21ST SEPTEMBER, 1940. Serial No. Suggestion. Submitted Remarks by I.S.S.B. by 1 For dissemination to German troops and people (although the German General Staff will, of course, be aware of its falsity):"That small-scale attempts at invasion have been made, and and have been beaten off with devastating losses. In Admiralty. We agree.