Excerpts from Books and Wikipedia
"Jináb-i-Quddús (Arabic: ?????)(c.1820–1849), is the title of Mullá Muh?ammad ‘Alí-i-Bárfurúshi, who was the most prominent disciple of the Báb. He was the eighteenth and final Letter of the Living. . . . He was sent to the town of Sárí for a madrassa education. Sometime in the mid-1830s he met Mullá Husayn (the first Letter of the Living) and other future Bábís after he joined a small group of students in Mashhad. When he was eighteen, Quddús left for Karbalá and spent four years as a student in Sayyid Kázim's circle. He returned to Bárfurúsh circa 1843. . . . He met the Báb in Shiraz and travelled with him as his companion on pilgrimage to Mecca, leaving Búshihr on the 19th of Ramadán (October, 1844), and arriving in Mecca on the first of Dhi’l-Hájjih (December 12, 1844)." [Wikipedia] "Last of the 18 Letters of the Living, second only to the Bab in rank, identified with one of the 'Messengers charged with imposture' (Qura'n 36:13s) and one of the two 'Witnesses' of St John the Divine." [Gail: Baha'i Glossary, p. 41]