 Complete the following phrase:  Mieczysław was born in his family manor in Saldutiškis Syłgudyszki on the lands of the partitioned PolishLithuanian Commonwealth then in the Russian Empire, now in Lithuania, or in Rostov-on-Don. His mother, Anela, was a sister of Stanisław Witkiewicz; she was also a distant relative of the Piłsudski family. His father, general Bolesław, was an engineer, the grandson of a Russian Army general who sided with the Polish 183031 insurgents during the 