The author of ‘Nildarpan’ was—

The author of the Bengali play 'Nil Darpan' (also known as 'The Indigo Planting Mirror') was Dinabandhu Mitra, who wrote it between 1858 and 1859 [t1][t2]. The play serves as a powerful social exposé of the violent abuses and exploitation committed by British indigo planters against Indian peasants in rural Bengal [t2][t3]. It played a crucial role in the Nil Vidroha or Indigo Revolt of 1859 by raising national consciousness regarding the plight of the peasantry [t1][t4]. The work gained significant notoriety when it was translated into English, leading to a major controversy that embarrassed the British Raj and reached the British Parliament [t3][t6]. While other figures like Harishchandra Mukherjee supported the cause through journalism (The Hindu Patriot), the literary authorship of the play belongs solely to Dinabandhu Mitra [t4][t7].

Sources

1. [1] https://en.wikipedia.org/wiki/Nil_Darpan