urs of his of which the general public knew nothing, and that he
was in some respects the most original and most fertile in discovery
of all his fellow workers in the same branch of science."

There can be little question that it was no accident that determined
the direction of Huxley's career. He was a naturalist by inborn
vocation. The contrast between a natural bent and an acquired habit of
life was well seen in the case of Huxley and Macgillivray, his
companion on the _Rattlesnake_. The former was appointed as a surgeon,
and it was no part of his duties to busy himself with the creatures of
the sea; and yet his observations on them made a series of real
contributions to biological science and laid the sure foundation of a
world-wide and enduring reputation. The latter was the son of a
naturalist, a naturalist by profession, and appointed to the
expedition as its official naturalist; and yet he made only a few
observations and a limited collection of curiosities, and even his
exiguous place in the annals of zooelogy is the accidental result of
his companionship with Huxley. The special natural endowments which
Huxley brought to the study of zooelogy were, in the first place, a
faculty for the patient and assiduous observation of facts; in the
second, a swift power of discriminating between the essential and the
accessory among facts; in the third, the constructive ability to
arrange these essentials in wide generalisations which we call laws or
principles and which, within the limits necessarily set by inductive
principles, are the starting-point for new deductions. These were the
faculties which he brought to his science, but there were added to
them two personal characteristics without which they would not have
taken him far. They were impelled by a driving force which
distinguishes the successful man from the muddler and without which
the finest mental powers are as useless as a complicated machine
disconnected from its driving-wheel. They were directed by a lofty and
disinterested enthusiasm, without which the most talented man is a
mere self-seeker, useless or dangerous to society. The faculties and
qualities which made Huxley great as a zooelogist were practically
those which he applied to the general questions of biological theory,
to the problems of education and of society, and to philosophy and
metaphysics. A comparison between his sane and forcible handling of
questions that lay outside the special provinc