Manoranjan Bandyopadhyay came to Santiniketan, Brahmmacharyashram as a teacher to help Rathindranath in his preparation for Matriculation Examination. But he resigned from his duty as a teacher and left the school before the examination of Rathindranath started. Rabindranath wrote him on 25 Feb, 2003,
You have joined the Brahmavidyalaya as a Head Teacher since the openning of the school. You have resigned on the ground of your health and I could not stand in your way. I have no other way to express my gratitude to you for the trouble you have taken with your efficient teaching capacity to make ready for final examination of the two students of the school to sit for the Matriculation examination.
It was not expected that Rathindra and Santosh could appear in the examination this year and it was you who made Rathindra ready for examination within a year and made Santosh ready for examination in less than a year time. I had gathered faith in you for your sincerity and efficiency as a teacher for the quality you possess. If opportunity comes again I would ask you to join.
Dwijendranath, too, wrote in a letter to him,
It seemed that you had left the school just to keep yourselves aloof. I would not have allowed you to go if your health would permit you to stay here .
It was not only for his health that Manoranjan Babu left Santiniketan was known to Rabindranath because he (Manoranjan bab) wrote on 19th Sept, 1903, to Rabindranath that it was his (Rabindranath's) weakness and attitude that helped him to resign This weakness was revealed when Rabindranath deputed Satyendranath Bhattacharya as the head of the institution and Kunjalal in charge of management of the school. Specially his contradiction with Kunjalal was much which was revealed from a letter written by Rabindranath on 2nd June, 1903,
'... Your mind was so agrieved with Kunja babu that I think needless to say anything about him to you. I would not even like to say that he had done wrong to you for it may add fire to the straw. I would not mention the reverse to add to your depression. The reason behind this contradiction was, probably, Rabindranath wanted to arrange accomodation of Kunja Babu with his family in the proposed laboratory room due to his want of fund to construct a separate accomodation for him.
Rabindranath had to face several resignation from teachers of Santiniketan for triffling matters, personality clashes, failure of being close to Rabindranath or to earn faith from him. Attraction for higher salary also was one of the factors of such resignation.
Even after submitting his resignation Rabindranath did not lose regards and gratitude for Manoranjan Babu and wished his success in his legal practice. He also offered him to take again the charge of the school. In return Manoranjan Babu too used to visit Santiniketan off and on and pass a few days there. Exchange of letters between Rabindranath and Manoranjan Babu lasted till his death.