For Yacov (Jacques Bolsky/Bolsey) we currently have much more historical material than for the other members of the family. This is due in part to the fact that Yacov left Russia just prior to the revolution of 1917 to continue his studies. During his years in Switzerland and later the US he was able to pursue his many professional and personal interests, and his prolific output and social visibility has left us with a great deal of documentation.