Semyon Goldwar’s uncle Grigoriy Rabinovich

My uncle Grigori Rabinovich. My mother's older brother Grigoriy Rabinovich was born around 1892. He was a brilliant and purposeful man. My mother recalled that he decided to learn to play the horn in his teens. It was too loud and all neighbors were unhappy about it, but he learned to play the horn. He finished grammar school in Odessa with honors and entered Physics and Mathematic Faculty at Moscow University before the revolution of 1917. After the revolution he lectured at the same university. In 1937 uncle Grigoriy was arrested. He was accused of an attempted encroachment on Stalin. He went on hunger strike in jail of which he died. We found out the details of Grigoriy's death only after Stalin died.