Following the purchase, FNL said the collection will remain in the public domain permanently and will never be lost to foreign institutions or private collections inaccessible to the UK public.
The collection includes several works by Charlotte, Emily and Anne Bronte, including short stories, poems and manuscripts, which have gone unseen for 80 years and never properly examined.
Works by Sir Walter Scott and Jane Austen also feature, including two letters from the latter to her sister Cassandra – one of which deals with the reception of pride and prejudice and meaning and sensitivity.
Also in the collection is a collection of poems, notes, personal letters and ideas gathered by Burns when he was a 24-year-old stranger.
The association said all manuscripts and printed books will be distributed to relevant institutions across the UK to ensure that as many people as possible can enjoy the literary “treasure”.