The library finds its origin in private collection of a bibliophile Mohammad Bakhsh and expanded by his son Khuda Bakhsh, who inherited 1,400 manuscripts and continued to add to the collection and eventually converted it into a private library by 1880.
The library was opened to public upon its inauguration by Sir Charles Alfred Elliott, Governor of Bengal on 5 October 1891.
Sohoni played a key role in ensuring that the collections were retained in India.
Apart from it the library also has specimens of Mughal paintings, calligraphy and book decoration and Arabic and Urdu manuscripts, including a page of Quran written on deer skin.
[11] The library also has a manuscript of Sahih al-Bukhari hand-transcribed by Shaykh Muhammad ibn Yazdan Bakhsh Bengali in Ekdala, eastern Bengal.