By chance Comrade Baron, editor of the anarchist organ Alarm, arrived in our city and spent about three weeks here. During this time Comrade Baron delivered a series of lectures on the labour question, and also spoke at mass meetings and was a great help in starting S.R.R. [Soyuz Russkikh Rabochikh (Union of Russian Workers)] No.2, which has already signed up 38 members. It’s very desirable to have such revolutionary workers dropping by on a regular basis to our neck of the woods. Comrade Baron speaks Russian fluently. Therefore, I suggest to all Russian labour organizations that they invite him to give lectures. Comrade Baron lives in Chicago.
From: Golos truda, May 9, 1916, No. 89 (in Russian). Translated by: Malcolm Archibald.
Also, some photos from wikipedia:
Aron Baron in exile with second wife Fanny Avrutskaya and daughter Voltairine
[added 25 June] The KSL wiki has a page to try and iron out some of the questions about Aron Baron’s life. Was he in charge of Poltava in 1918? http://katesharpleylibrary.pbworks.com/w/page/67211653/Aron%20Baron%20%28notes%20and%20queries%29