Seems Israel aware coup plans and is extremely nervous. Prospect exists if coup successful and UAR influence appears predominant, Israel may decide for military action in Jordan or Egypt, or both. Ambassadors in area should review emergency plans and preparations without in any way revealing above knowledge.
For London: Situation being reviewed today with UK Embassy. Request you do so likewise with FonOff.
For Tel Aviv: If coup attempt in fact takes place you should at once strongly advise Ben-Gurion take no military action and say we will maintain close touch with GOI. It by no means clear coup, if successful, would mean immediate Nasser control over Jordan or introduction non-Jordan forces. We will use full weight our influence toward unchanged situation on Jordan-Israel border.
For Damascus and Baghdad: In event Jordan coup effort you should immediately approach Government at highest level and say every effort will be made prevent external interference and spread of coup. Syria and Iraq can make best contribution by remaining absolutely quiet and in no way goading Israelis.
For Cairo: In event coup, advise Nasser if UAR identifies itself as coup author or mentor it would only serve goad Israel. We rely on UAR avoid any measure contributing to risk conflagration involving others beyond Jordan.