In the context of 'preface of The Indian Struggle'.

Bose was searching for a literary figure to write a preface to his book, The Indian Struggle,  for the publisher thought this would help the sales. He wrote to Rabindranath Tagore seeking assistance in contacting Bernard Shaw . He chided Tagore for the perfunctory letter Tagore had written to Romain Rolland on his behalf earlier.

Tagore declined to write Shaw and he did not comment on the rough and ready , blunt manner in which Bose wrote to him. Nepal Majumdar , a historian , noted on Bose-Tagore relationship by saying that usually people did not write to Tagore in such a fashion. Tagore thought that Gandhi had and would have an enduring impact on India.To ignore Gandhi's power Tagore told Bose , was to blind one's self to the realities of modern India.
Bose completed the manuscript and before long , by the later months of 1934, was reading the proof of his book.
In august he had gone to Karlsbad, a spa, to drink the hot , salty mineral waters to see whether they would cure his abdominal pains.