In Nov 1855 the Rev. Charles Dall (a Unitarian minister of Boston) arrived in Calcutta to start his mission and immediately established contact with Debendranath and other Brahmos.
Disgusted by politics within the Tagore family and the support to K.C.Sen's faction by his own brother Satyendranath Tagore, Hemendranath took the bold decisions to expand his Sabha out from Calcutta.