"Over five million rare and one-off books and items stored in the underground vaults of the Rs 100-crore Bhasha Bhavan building and the old annexe of the National Library are in danger of being damaged by water seepage.

At risk of being destroyed are original manuscripts of Tagore and Netaji, their letters and rare, one-off world maps.

The books and manuscripts, preserved in the two-storeyed underground vaults, were ruined after water seeped through the walls and flooded the room. At the old annexe, the ground floor, which houses the maps and rare books departments, is water-bound."

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