The collection consists of correspondence from such ballet and theater personalities as Sergeĭ Khudi︠a︡kov, Sergeĭ Lifar,́ Nadezhda Nikolaeva-Legat, Alekander Sanin and Vera Trefilova. There is also one letter each from Zinaida Gippi︠u︡s, Nadezhda Teffi, Boris Zaĭt︠s︡ev and Vladimir Zeeler. In addition, there are several typed manuscripts by Pleshcheev, including his book-length biography of E.N. Roschina-Insarova, and clippings of newspaper articles by Pleshcheev.