From these remarks we gather how invaluable the trustworthy narrative of this disinterested and well-informed traveller would have been. Just as an untimely death ended Seetzen's self-imposed mission, Burckhardt set out upon a similar enterprise, and like him commenced his long and minute exploration of Arabia by preliminary travel through Syria. "It is seldom in the history of science," says M. Vivien de Saint Martin, "that we see two men of such merit succeed each other in the same career or rather continue it; for in reality Burckhardt followed up the traces Seetzen had opened out, and, seconded for a considerable time by favourable circumstances which enabled him to prosecute his explorations, he was enabled to add very considerably to the known discoveries of his predecessor." Although John Lewis Burckhardt was not English, for he was a native of Lausanne, he must none the less be classed among the travellers of Great Britain. It was owing to his relations with Sir Joseph Banks, the naturalist who had accompanied Cook, and Hamilton, the secretary of the African Association, who gave him ready and valuable support, that Burckhardt was enabled to accomplish what he did. Burckhardt was a deeply learned man. He had passed through the universities of Leipzic, and Gottingen, where he attended Blumenbach's lectures, and afterwards through Cambridge, where he studied Arabic. He started for the East in 1809. To inure himself to the hardships of a traveller's life, he imposed long fasts upon himself, accustomed himself to endure thirst, and chose the pavements of London or dusty roads for a resting-place. But how trifling were these experiences in comparison with those involved in an apostolate of science! Leaving London for Syria, where he hoped to perfect his knowledge of Arabic, Burckhardt intended to proceed to Cairo and to reach Fezzan by the route formerly opened up by Hornemann. Once arrived in that country, circumstances must determine his future course. Burckhardt, having taken the name of Ibrahim-Ibn-Abdallah, intended to pass as an Indian Mussulman. In order to carry out this disguise, he had recourse to many expedients. In an obituary notice of him in the "Annales des Voyages," it is related that when unexpectedly called upon to speak the Indian language, he immediately had recourse to German. An Italian dragoman, suspecting him of being a giaour, pulled him by his beard, thereby offering him the greatest insult possible in his character of Mussulman. But Burckhardt had so thoroughly entered into the spirit of his role, that he responded by a vigorous blow, which sending the unfortunate dragoman spinning to a distance, turned the laugh against him, and thoroughly convinced the bystanders of the sincerity of the traveller. [Illustration: Portrait of Burckhardt. (Fac-simile of early engraving.)]