[2] He began his revolutionary career as a schoolboy, together with his friend and future Russian Communist Party chairman Yakov Sverdlov.

In an attempt to escape, the punishment was toughened by ordering to spend 12 years in exile in the Yakutsk Province.

Participated in the preparation of the Prague Conference of the Russian Social Democratic Labour Party.

Killed on September 25, 1919, by a bomb thrown by members of an anarchist group at the premises of the Moscow Committee of the Russian Communist Party (Bolsheviks) in Leontievsky Lane.

According to eyewitnesses, Zagorsky from the presidium table rushed towards the shot, to the place where the shell fell, to prevent danger; as he walked, he shouted: "Quiet, nothing special, we will now find out what is the matter".

By this, he, apparently, brought some peace of mind, which prevented the hustle and bustle: a significant part of those present managed to leave the room.