The papers consist of manuscripts, photographs, and printed materials. Among the manuscripts are his typescript memoirs entitled "Vstrechi na zhiznennom puti" (53 pp.), which discuss his youth, student days in the history faculty of Moscow University, his work in the Constitutional Democratic (Kadet) Party, and the 1917 Revolution; and manuscripts of articles, some concerning the emigre monarchist movement. There are four photographs of Efimovskiĭ. Printed materials include offprints of his articles.