We think in abstractions, but we live in concretions. In real life an individual who is not in any way distinguishable from his fellows is but a poor creature after all and is not held of much account by anybody. That law of nature which makes the leaves of a tree or the units of any genus, any species, any variety all different—which in the animal or the vegetable world alike makes each unit or class distinguishable whilst adhering to the type—is of paramount importance to man. Tennyson has hammered all this out and to a wonderful conclusion in those splendid stanzas of _In Memoriam_ LIV to LVI beginning “Oh yet we trust that somehow good” to “Behind the veil, behind the veil.” Let it be sufficient for us to know and accept that there can be endless individual idiosyncrasies without violation of type. To understand these is the study of character. The _differentia_ of each individual is an endless and absorbing study, not given to all to master. Some at least of this mastery is a necessary part of the equipment of an actor. Now there is a common saying that “the eyebrow is the actor’s feature.” This is largely true; but there is a double purpose in its truth. In the first place the eyebrow is movable at will; a certain amount of exercise can give mobility and control. It can therefore heighten expression to a very marked degree. But in addition it, when in a marked degree, is the accompaniment of large frontal sinuses—those bony ridges above the eyebrows which in the terminology of physiognomy imply the power to distinguish minute differences, and so are credited with knowledge of “character”—the difference between one and another; divergences within a common type. With this natural equipment and the study which inevitably follows—for powers are not given to men in vain—the actor can by experience know types, and endless variants and combinations of the same. So can any man who has the quality. But the actor alone has to work out the ideas given to him by this study in recognisable material types and differentiated individual instances of the same type. _x_