Chapter IV: THE SPECIALIST TYPE.--It would say little for scientific discipline

if it were true that a man learned, let us say, in zoology, could spend years in a new country without having something fresh to tell us about matters outside of his specialism--the rocks, the plants, and the people. But it is not true. There have been few great travellers who have been narrow specialists, and one might find more than one case of a naturalist starting on his travels as a zoologist and returning an anthropologist as well. Yet it is evident enough that few men can be master of more than one craft. There have been few travellers like Humboldt, few records like Darwin’s _Voyage of the Beagle_ (1831-6). Hence we recognize more and more as we approach our own day that naturalist-travellers have been successful either as specialists, or, on the other hand, in so far as they have furnished material for generalization (Type V.). The specialism may of course take various forms: a journey may be undertaken by one who is purely an ornithologist, or it may be undertaken with one particular problem in view, or it may be organized, like the _Challenger_ expedition, with the co-operation of a number of specialists.

The French took the lead in organizing zoological expeditions. As early as 1800 they sent out the _Géographe_, _Naturaliste_, and _Casuarina_, zoologically conducted by Bury de St. Vincent, Péron, and Lesueur. Further expeditions followed with Quoy and Gaimard, Lesson, Eydoux, Souleyet, Dupetit-Thouars, and others as zoological guides. The English whaling industry gave early opportunity to not a few naturalists; and it is now a long time since Hooker went with Sir James Ross on the South Polar expedition and Huxley went on the _Rattlesnake_ to the Australian Barrier Reef. The Russians were also active, one of the more famous travellers being Kotzebue, who was accompanied on one of his two voyages (1823-6) round the world by Chamisso and Eschscholtz. In the early part of this century the Americans were also enterprising, the work of Dana being perhaps the most noteworthy. It would require several pages to mention even the names of the naturalists who have had their years of wandering, and have added their pages and sketches to the book of the world’s fauna and flora, but such an enumeration would serve no useful purpose here.

There is, however, one form of zoological exploration which deserves a chapter to itself, that is the exploration of the Deep Sea. Several generations of marine zoologists had been at work before a zoology of the deep sea was dreamed of even as a possibility. It is true that in 1818 Sir John Ross had found a star-fish (_Astrophyton_) at a depth of 800-1000 fathoms, but this was forgotten; and in 1841 Edward Forbes dredged to no purpose in fairly deep water in the Ægean Sea. Indeed those who thought about the great depths at all deemed it unlikely that there could be life there, and if it had not been for the practical affair of laying the ocean cables, we might possibly have been still in ignorance of the abyssal fauna.

But the cables had to be laid--no easy task--and it became important to know at least the topography of the depths. Cables broke, too, and had to be fished up again, and when that which ran between Sardinia and Algiers was lifted, in 1860, from a depth of 60-1000 fathoms, no less than 15 different species of animals were found on it. This was a discovery to fire enthusiasm, and Britain led the way in following it up. In 1868 Wyville Thomson began his explorations on the _Lightning_, and proved that most of the types of backboneless animals were represented at depths of at least 600 fathoms. Soon followed the similar cruise of the _Porcupine_, famous _inter alia_ for the discovery of Bathybius, which many sceptics regard as a mare’s nest. From various quarters the quest after the deep-sea fauna began to be prosecuted.

It is now more than a score of years since the world-famous _Challenger_ sailed from Portsmouth with Wyville Thomson, Moseley, John Murray, and Willemoes-Suhm as naturalists. During three and a half years the explorers cruised over 68,900 nautical miles, crossed the Atlantic no less than five times, reached with the long arm of the dredge to depths equal to reversed Himalayas, raised treasures of life from over 500 stations, and brought home spoils over which the savants of Europe have hardly ceased to be busy, and the records of which, now completed under Dr. Murray’s editorship, form a library of about forty huge volumes.

The _Challenger_ expedition was important not only in itself, but in the wave of scientific enthusiasm which it raised. From Germany went forth the _Gazelle_; Norway sent the _Vöringen_ to Spitzbergen; America has despatched the _Tuscarora_, the _Blake_, and the _Albatross_; from Sweden the _Vega_ and the _Sophia_ sailed to Arctic seas: Count Liechtenstein’s yacht _Hertha_ explored Adria; the Prince of Monaco’s _Hirondelle_ darted hither and thither; the French sent forth the _Travailleur_ and _Talisman_; the Italians the _Vettor Pisani_ and _Washington_; Austria and Hungary organized the _Poli_ for work in the Mediterranean; the Germans again have recently specialized in investigating the Plankton, or surface-life of the ocean; and so, with a range even wider than we have indicated, the wave of enthusiasm has spread, one of the latest barques which it has borne being the Prince of Monaco’s, which was specially built for marine exploration.

Specialism in travelling has, of course, gone much further. Thus to cite only three examples, we have Semper’s zoological work on the Philippines, the researches of the Sarasins in Ceylon, and the first results of Semon’s recent visit to Australasia, all of them passing far beyond records of zoological exploration into monographs on the structure and development of characteristic members of the fauna of these countries. And it is no exaggeration to say that private enterprise, Royal Society subsidies, British Association grants, and the like have sent scores of naturalists from Britain half round the world in order to solve special problems, as to the larva of a worm, for instance, or as to the bird-fauna of some little island.