The third volume of "Leaves of the Diary" of N.K. Roerich includes essays and letters from the last years of his life - 1942–1947. Written during the harsh years of world war and devastation, they carry a call for the cultural unity of mankind and service to the Motherland, teach the perception of the eternal and true. The texts of the “Sheets” are reproduced from materials from the archives of the Mongolian People’s Republic, the majority of which are published for the first time.