The book has no rival as a source-material on the condition of India during reign of Shahjahan. Political intriques and battles for the throne among his children - Dara, Sujah, Aurangzeb and Morad-Bakche has also been detailed out. The book is translated from the French by Iriving Brook which has given a vivid description of Delhi and Agra - the capital cities of the empire of the great Moguls. The original author was a physician and companion of Danishmand Khan and it was written in Delhi in July, 1663.Every attempt that is made by scientific research or literary labour to elucidate the history and establish the truth of any record regarding India - this mighty aggregate of former kingdoms, must derive its materials from and refer to this work - because it is the only authentic source of that information which an eye witness can afford - as well as being the testimony of an European who dealt with subjects like reception of diplomats, upbringing of princes, courage of women, beauty of Kashmiri women, price of wine, living condition in Agra and Delhi, wealth of the Moguls, etc.