Burton’s departure from the army threatened to destroy him, but he went on to further adventures around the world. He famously entered Mecca in disguise (1853), was wounded in Somaliland, sought the source of the Nile on two separate eventful journeys (1855 and 1857-58) and in 1860 crossed America to visit the Mormons in Salt Lake City. Immediately after his marriage to the staunchly Catholic Isabel Arundell he embarked on a turbulent diplomatic career, being posted to Fernando Po (1861), then to Santos in 1865 and Damascus (1869). He was sent to Trieste in 1872, where he remained until his death 12 years later. Isabel then burned many of his documents and manuscripts, perpetrating one of the greatest literary crimes of the century.

Troyanov’s sympathetic novel is the product of immense research and understanding. We are led into the author’s imagined history of actual events as seen first through the eyes of Burton’s Indian servant, who introduced him to the languages and mysteries of the East; then from the viewpoint of the Ottoman governor of Hijaz, who conducts an enquiry with the men who accompanied the disguised Burton on his journey to Mecca; and finally we have the account of Sidi Muburak, the former African slave, who led Burton and his companion John Hanning Speke on their ill-fated journey to find the source of the Nile in 1857.

Iliya Troyanov himself is a collector of worlds. He was born in Bulgaria, fled to West Germany with his family to escape persecution, and grew up speaking German before emigrating to Kenya where he learned English. He is the author of Mumbai to Mecca, an account of his own pilgrimage to Mecca, and in The Collector of Worlds he has painstakingly followed the outline of Burton’s cryptic career, but unashamedly elaborated on the many frustrating gaps. It is a fascinating revelation, and speaks as much of Troyanov’s personal approach to Burton’s mystery as to any real solution. In doing so it invites us to share Burton’s passion both for geographical discovery and for the unknowable and the unthinkable. One of the great values of this absorbing novel is that we are allowed to discover for ourselves the passionate curiosity that shaped Burton’s entire life, where he used language and religion as his passports to a hitherto forbidden world, and where his zeal for adventure knew no bounds.

Troyanov’s scholarship has given us a new understanding of Burton’s world. It is an intensely passionate journey, and a wonderful piece of storytelling.

Sir Christopher Ondaatje is a trustee of the National Portrait Gallery.

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