What strange inscriptions were found on walls of the house of Ipatyev after execution of an imperial family

Really, on walls of that room in which members of an imperial family were killed, investigators found some mysterious inscriptions. Investigator Sokolov in the memoirs mentioned that at his life many inscriptions remained a riddle. However after a letter and figure at last were deciphered. "Valtatsar" Heine It is known that one of investigators, being engaged in case of Nikolay's II execution, members of his family and an environment was Sergeev I. A.. investigator Sokolov N. A. in the memoirs "Murder of an Imperial Family" mentioned another that Sergeyev found on the southern wall of the room...