Always suffering from impecuniosity, the Burtons were perpetually revolving schemes for increasing their income. One was to put on the market a patent pick-me-up, good also for the liver, to be called, "Captain Burton's Tonic Bitters," the recipe of which had been "acquired from a Franciscan monk." "Its object," observed Burton facetiously, to a friend, "is to make John Bull eat more beef and drink more beer." Mrs. Burton imagined naively that if it were put into a pretty bottle the demand would exceed the supply. They had hopes, too, for the Camoens, which had taken many years of close application and was now approaching completion. Still, it was argued that a Translation of Camoens, however well done, could not hope for the success of a well-advertised liver tonic, seeing that while most people have a liver, it is only here and there one who has a taste for Camoens. The tonic was placed on the market, but the scheme, like so many others, proved a fiasco. Nobody seemed to want to be picked up, and the indifference of a Christian nation to the state of its liver, was to Burton extremely painful. So he abandoned philanthropy, and took to lecturing before the Anthropological and other societies, dining out, and calling on old friends. One Sunday he visited the Zoo; but when he asked for a glass of beer at the refreshment bar, the girl declined to serve him because he was "not a bona-fide traveller!"

In 1875, Burton's portrait, painted by the late Lord Leighton, was exhibited in the Academy; and on July 6th of the same year, Burton started off on a second trip to Iceland, which occupied him six weeks, but he and his wife did not meet again till October 6th. On December 4th (1875) they left London for the Continent. The morning was black as midnight. Over the thick snow hung a dense, murky fog, while "a dull red gleam just rendered the darkness visible."

"It looks," said Burton, "as if London were in mourning for some great national crime."

To which Mrs. Burton replied, "Let us try to think, darling, that our country wears mourning for our departure into exile."

On reaching Boulogne they sought out some of their old acquaintances, including M. Constantin, Burton's fencing master. After a brief stay in Paris, they proceeded to Trieste, ate their Christmas dinner, and then set out for India, partly for pleasure and partly for the purpose of collecting information about the abandoned diamond mines of Golconda.