Yule had no more predilection for the Monastic Orders than most of his countrymen, but his sense of justice was shocked by the cruel incidence of the measure in many cases, and also by the harshness with which both it and the punishment of suspected insurgents was carried out. Cholera was prevalent in Italy that year, but Sicily, which had maintained stringent quarantine, entirely escaped until large bodies of troops were landed to quell the insurrection, when a devastating epidemic immediately ensued, and re-appeared in 1867. In after years, when serving on the Army Sanitary Committee at the India Office, Yule more than once quoted this experience as indicating that quarantine restrictions may, in some cases, have more value than British medical authority is usually willing to admit.
In 1867, on his return from London, Yule commenced systematic work on his long projected new edition of the Travels of Marco Polo. It was apparently in this year that the scheme first took definite form, but it had long been latent in his mind. The Public Libraries of Palermo afforded him much good material, whilst occasional visits to the Libraries of Venice, Florence, Paris, and London, opened other sources. But his most important channel of supply came from his very extensive private correspondence, extending to nearly all parts of Europe and many centres in Asia. His work brought him many new and valued friends, indeed too many to mention, but amongst whom, as belonging specially to this period, three honoured names must be recalled here: Commendatore (afterwards Baron) CRISTOFORO NEGRI, the large-hearted Founder and First President of the Geographical Society of Italy, from whom Yule received his first public recognition as a geographer, Commendatore GUGLIELMO BERCHET (affectionately nicknamed il Bello e Buono), ever generous in learned help, who became a most dear and honoured friend, and the Hon. GEORGE P. MARSH, U.S. Envoy to the Court of Italy, a man, both as scholar and friend, unequalled in his nation, perhaps almost unique anywhere.
Those who only knew Yule in later years, may like some account of his daily life at this time. It was his custom to rise fairly early; in summer he sometimes went to bathe in the sea,[58] or for a walk before breakfast; more usually he would write until breakfast, which he preferred to have alone. After breakfast he looked through his notebooks, and before ten o'clock was usually walking rapidly to the library where his work lay. He would work there until two or three o'clock, when he returned home, read the Times, answered letters, received or paid visits, and then resumed work on his book, which he often continued long after the rest of the household were sleeping. Of course his family saw but little of him under these circumstances, but when he had got a chapter of Marco into shape, or struck out some new discovery of interest, he would carry it to his wife to read. She always took great interest in his work, and he had great faith in her literary instinct as a sound as well as sympathetic critic.
The first fruits of Yule's Polo studies took the form of a review of Pauthier's edition of Marco Polo, contributed to the Quarterly Review in 1868.
In 1870 the great work itself appeared, and received prompt generous recognition by the grant of the very beautiful gold medal of the Geographical Society of Italy,[59] followed in 1872 by the award of the Founder's Medal of the Royal Geographical Society, while the Geographical and Asiatic Societies of Paris, the Geographical Societies of Italy and Berlin, the Academy of Bologna, and other learned bodies, enrolled him as an Honorary Member.
Reverting to 1869, we may note that Yule, when passing through Paris early in the spring, became acquainted, through his friend M. Charles Maunoir, with the admirable work of exploration lately performed by Lieut. Francis Garnier of the French Navy. It was a time of much political excitement in France, the eve of the famous Plébiscite, and the importance of Garnier's work was not then recognised by his countrymen. Yule saw its value, and on arrival in London went straight to Sir Roderick Murchison, laid the facts before him, and suggested that no other traveller of the year had so good a claim to one of the two gold medals of the R.G.S. as this French naval Lieutenant. Sir Roderick was propitious, and accordingly in May the Patron's medal was assigned to Garnier, who was touchingly grateful to Yule; whilst the French Minister of Marine marked his appreciation of Yule's good offices by presenting him with the magnificent volumes commemorating the expedition.[60]
Yule was in Paris in 1871, immediately after the suppression of the Commune, and his letters gave interesting accounts of the extraordinary state of affairs then prevailing. In August, he served as President of the Geographical Section of the British Association at its Edinburgh meeting.
On his return to Palermo, he devoted himself specially to the geography of the Oxus region, and the result appeared next year in his introduction and notes to Wood's Journey. Soon after his return to Palermo, he became greatly interested in the plans, about which he was consulted, of an English church, the gift to the English community of two of its oldest members, Messrs Ingham and Whitaker. Yule's share in the enterprise gradually expanded, until he became a sort of volunteer clerk of the works, to the great benefit of his health, as this occupation during the next three years, whilst adding to his interests, also kept him longer in the open air than would otherwise have been the case. It was a real misfortune to Yule (and one of which he was himself at times conscious) that he had no taste for any out-of-door pursuits, neither for any form of natural science, nor for gardening, nor for any kind of sport nor games. Nor did he willingly ride.[61] He was always restless away from his books. There can be no doubt that want of sufficient air and exercise, reacting on an impaired liver, had much to do with Yule's unsatisfactory state of health and frequent extreme depression. There was no lack of agreeable and intelligent society at Palermo (society that the present writer recalls with cordial regard), to which every winter brought pleasant temporary additions, both English and foreign, the best of whom generally sought Yule's acquaintance. Old friends too were not wanting; many found their way to Palermo, and when such came, he was willing to show them hospitality and to take them excursions, and occasionally enjoyed these. But though the beautiful city and surrounding country were full of charm and interest, Yule was too much pre-occupied by his own special engrossing pursuits ever really to get the good of his surroundings, of which indeed he often seemed only half conscious.
By this time Yule had obtained, without ever having sought it, a distinct and, in some respects, quite unique position in geographical science. Although his Essay on the Geography of the Oxus Region (1872) received comparatively little public attention at home, it had yet made its mark once for all,[62] and from this time, if not earlier, Yule's high authority in all questions of Central Asian geography was generally recognised. He had long ere this, almost unconsciously, laid the broad foundations of that "Yule method," of which Baron von Richthofen has written so eloquently, declaring that not only in his own land, "but also in the literatures of France, Italy, Germany, and other countries, the powerful stimulating influence of the Yule method is visible."[63] More than one writer has indeed boldly compared Central Asia before Yule to Central Africa before Livingstone!
Yule had wrought from sheer love of the work and without expectation of public recognition, and it was therefore a great surprise as well as gratification to him, to find that the demand for his Marco Polo was such as to justify the appearance of a second edition only a few years after the first. The preparation of this enlarged edition, with much other miscellaneous work (see subjoined bibliography), and the superintendence of the building of the church already named, kept him fully occupied for the next three years.
Amongst the parerga and miscellaneous occupations of Yule's leisure hours in the period 1869–74, may be mentioned an interesting correspondence with Professor W. W. Skeat on the subject of William of Palerne and Sicilian examples of the Werwolf; the skilful analysis and exposure of Klaproth's false geography;[64] the purchase and despatch of Sicilian seeds and young trees for use in the Punjab,