In the days before radio, Bengali society had literature and the arts to keep itself company (besides politics). Writing and reading poetry was a common hobby. Three principal literary journals were Bharatvarsha, Probasi and Bichitra. The long-standing editor of Bharatvarsha was Jaladhar Sen, and it was he who had introduced Sarat Chandra Chattopadhyaya to Manindranath when Sarat had returned (in impecunious circumstances) to Bengal from Burma, probably with a request that Sarat be supported and sponsored.
This was a letter received by Manindranath from Jaladhar Sen expressing condolences at the passing of his father, Surendranath, who died on November 11, 1929. (Surendranath likely died from his injury sustained along with Ardeshir Dalal from Bhagat Singh’s bomb on 8 April 1929. https://independentindian.com/2008/06/17/surendranath-roy-1860-1929/)