Khwaja Abdur Rauf Ishrat Lakhnavi (1868-1940) was a poet, prose writer, prosodist, lexicographer and philologist. Another domain of his was literary historiography and criticism.
Born into a well-off family of Lucknow, Lakhnavi, while he had no formal schooling, mastered Persian and Arabic and profoundly studied classical Urdu and Persian literature.
Some of his works, such as Usool-i-Urdu, Zaban Dani and Islah-i-Zaban-i-Urdu, deal with the grammar and correct usage of language. In four slim parts he wrote a series on Urdu prosody. His Aab-i-Baqa is a tazkira, a genre that records the biographical sketches of poets and offers samples of their poetic works with a brief critical analysis. Aab-i-Baqa offers a quick look into the life and works of some 40 poets from Lucknow and Delhi.