Edward Granville Browne (1862–1926) was a British orientalist renowned for his work on Persia. In this book, which was first published in 1918, Browne provided readers with access to previously unpublished material on the Bábí religious movement, which came to prominence in Persia between 1844 and 1852, before continuing in exile in the Ottoman Empire. This material was gathered by the author as a result of the development of personal relationships with key figures in the movement, such as Subh-i-Azal and Bahá'u'lláh, from 1890 onwards. Prior to publication, it was translated into English, where necessary, and properly organised to increase intelligibility. This is a highly informative text that will be of value to anyone with an interest in the development of Bábism.