We shall often notice in Burton's life what Burton himself called his dual nature. In the tale of Janshah in The Arabian Nights we read of a race of split men who separated longitudinally, each half hopping about contentedly on its own account, and reuniting with its fellow at pleasure. If Burton in a pre-existent state—and he half believed in the Pre-existence of Souls—belonged to this race, and one of his halves became accidentally united to one of the halves of somebody else, the condition of affairs would be explicable. In any circumstances, he was always insisting on his duality. For example—a kind-hearted man, who detested cruelty to animals, nevertheless he delighted, as we have seen, in the sport of cocking; an ambitious man, who wore himself out with his studies yet he neutralised all his efforts to rise by giving way to an ungovernable temper. He would say just what he thought, and no man could have exhibited less tact. Thus he managed to give offence, and quite unnecessarily, to his superior officer, Colonel Henry Corsellis, and they were henceforth at handgrips.

Among his favourite books was Jami's Beharistan. The only pity is that he did not take the advice proffered in the Third Garden:

"If Alexander's realm you want, to work adroitly go, Make friends more friendly still, and make a friend of every foe."

Other instances of opposing qualities will be noticed as this work proceeds. Late in life, when he took to glasses, Burton used to say "My duality is proved by my eyes alone. My right eye requires a No. 50 convex lens, my left a No. 14." His assiduous application to his studies now brought about an illness, and, having returned to Bombay, he obtained two years' leave of absence to the salubrious Neilgherries.