A considerable proportion of Zvegintzov's archive consists of the papers produced by Political and Economic Planning and the Royal Institute of International Affairs, some of them by MZ, and of his correspondence with other members on their own subjects. Nothing at all has been found about his early life in Russia, but his papers contain a number of letters in Cyrillic script. These were studied by a Russian speaking Fellow Commoner at Churchill College (Henryk Krzeckowski) in 1980, and the notes attached to them are in his hand. Most of them are family letters, but they have been preserved as examples of the tenacity of a Russian refugee family in maintaining touch with each other. MZ’s activities in the immediate pre-war and war time years are fairly fully documented, and the greatest interest in his papers probably lies in the reports he wrote on Germany and other countries, and in the papers he prepared and the broadcasts he made for the BBC's Overseas Service.