That the Siamese are one of the numerous tribes which constitute that great and singular family of the human race, known generally by the appellation of Mongols, will appear to most persons sufficiently obvious. If they do not possess, in the most acute degree, the peculiar features of the original, they are at least stamped with traits sufficiently just to entitle them to be considered as copies. There is, however, one general and well-marked form, common to all the tribes lying between China and Hindostan. Under this head are comprehended the inhabitants of Ava, Pegu, Siam, Cambodia, and even of Cochin-China, though those of the latter country more resemble the Chinese than the others. This distinctive character is so strongly blended with the Mongol features that we have no hesitation in considering these nations as deriving their origin from that source. It appears to me that to this source also we ought to refer the Malays[13], who cannot be said to possess national characters, at least of physiognomy and physical form, sufficiently distinct and obvious to entitle them to be considered as a distinct race. Where there is a difference between the Malays and the tribes mentioned, it is more to be referred to the condition of the mental faculty, than to that of bodily form; to the state of manners, habits of life, language; in short to circumstances altogether, or in great part, produced by mind. In other respects they would appear to differ but little from the tribes mentioned above. Traces of a much ruder people are to be met with in the mountainous districts of these kingdoms, particularly in the peninsula of Malacca. Our knowledge of these is much too scanty to enable us to trace their filiation. Though generally asserted, there are no records to prove that they are the aboriginal inhabitants of the country, at least of any other part of it than the wilds and impenetrable forests which they continue to occupy. The woolly-headed race, and another resembling the Indian, are not uncommon[14]. Their origin will probably ever remain uncertain.
The following observations will be found to apply to the several nations already mentioned, and in general to the Chinese also, whom I consider as the prototype of the whole race. A multitude of forms are to be seen in every nation, not referable to any particular family or variety of the human race. For our present purpose, we must select such only as possess the peculiar form in the most characteristic degree. But as all the requisites of this form are not always developed in a very acute degree in all, we must collect from a multitude of instances, what appears to be the predominating tendency. In this way we may make out a portrait of the whole.
The stature of the body would appear to be much alike in all the tribes of the Mongol race, the Chinese being perhaps a little taller, and the Malays lower than the others. In all it is below that of the Caucasian race. The average height of the Siamese, ascertained by actual measurement of a considerable number of individuals, amounts to five feet three inches.
The skin is of a lighter colour than in the generality of Asiatics to the west of the Ganges; by far the greater number being of a yellow complexion, a colour which, in the higher ranks, and particularly amongst women and children, they take pleasure in heightening by the use of a bright yellow wash or cosmetic, so that their bodies are often rendered of a golden colour. The texture of the skin is remarkably smooth, soft, and shining.
Throughout the whole race there is a strong tendency towards obesity. The nutritious fluids of the body are principally directed towards the surface distending and overloading the cellular tissue with an inordinate quantity of fat. The muscular textures are in general soft, lax, and flabby, rarely exhibiting that strength or developement of outline which marks the finer forms of the human body. In labourers and mechanics, particularly the Chinese, the muscular parts occasionally attain considerable volume, but very rarely the hardness and elasticity developed by exercise in the European race. On a simple inspection, we are apt to form exaggerated notions respecting their muscular strength, and capacity for labour. A more close examination discovers the reality, and we find that something more than volume is necessary to constitute vigour of arm.
In point of size, the limbs are often equal to, if not larger than those of Europeans, particularly the thighs, but this magnitude of volume will be found to depend upon the cause alluded to above. The same circumstance gives to the whole body a disproportionate bulk; and hence they form what is called a squat race.
The face is remarkably broad and flat, the cheek-bones prominent, large, spreading, and gently rounded. The glabellum is flat and unusually large. The eyes are in general small. The aperture of the eye-lids, moderately linear in the Indo-Chinese nations and Malays, is acutely so in the Chinese, bending upward at its exterior termination. The lower jaw is long, and remarkably full under the zygoma, so as to give to the countenance a square appearance. The nose is rather small than flat, the alæ not being distended in any uncommon degree; in a great number of Malays, however, it is largest towards the point. The mouth is large, and the lips thick. The beard is remarkably scanty, consisting only of a few straggling hairs. The forehead, though broad in the lateral direction, is in general narrow, the hairy scalp descending very low. The head is peculiar. The diameter from the front backwards is uncommonly short; and hence the general form is somewhat cylindrical. The occipital foramen in a great number of instances is placed so far back, that from the crown to the nape of the neck is nearly a straight line. The top of the head is often unusually flat. The hair is thick, coarse, and lank, in some shewing a disposition to curl on the forehead, but this is more peculiar to the Malays. The colour is always black.
The limbs are thick, short and stout, and the arms rather disproportionate in length to the body.