Conversation so far:
What is santiniketan in relation to Rabindranath Tagore?
In 1901 Rabindranath Tagore moved to Santiniketan to found an ashram with a marble-floored prayer hall—The Mandir—an experimental school, groves of trees, gardens, a library.
what happened in 1901 after Rabindranath Tagore moved to Santiniketan?
In Santiniketan, Rabindranath Tagore's wife and two of his children died.

Question: How did they die?
Self-contained rewrite: How did Rabindranath Tagore's wife Mrinalini Devi die in 1902?