Mehdi Hasan Khan was a Hyderabadi Civil Servant of Lucknow Origin. Born in around 1852, he met and married Ellen Gertrude Donnelly, the daughter of the Irish Resident of Lucknow. In 1883, he got a job in Hyderabad and became Chief Justice in 1886. In 1887 he was given the title Fath Nawaz Jung by the Nizam.
In 1888 he was deputed by the Nizam to travel to London regarding a case involving the Hyderabad (Deccan) Mining Company. During his time in Britain, Khan wrote a diary of observations. This was first partly published in a few edited extracts by Mary Hobhouse in the Indian Magazine in 1890. It was then also published for private circulation in 1890.
Associated with Sayyid Ahmad Khan and the Aligarh College, Khan arrived in England with introductions to relatives and colleagues of English officials. He was received in London by Theodore Beck's sister and invited to a 'drawing room' held by Queen Victoria in Buckingham Palace on 9 May 1888. The diaries deal with his visits to various landmarks and towns in England, the people he met and also provide some social commentary on British life.