Complex sentence: In the early 20th century Rasputin stole a number of Arthur Dee's translations into Russian of his father's writings which were later reclaimed by the Romanov family and returned to the Imperial Library in Moscow.
Split into simpler sentences: In the early 20th century Rasputin stole a number of Arthur Dee's translations of his father's writings into Russian. They were later reclaimed by the Romanov family and returned to the Imperial Library in Moscow.