Of the human colossi, again, some were isolated, and were probably objects of worship; others were merely ornaments, chiefly employed as columns, as in the famous Propylæon of the Temple of Vulcan, ascribed to Psammetichus, and erected at Memphis. Of the unattached figures, the attitude appears to have exhibited but little action; the posture apparently various, though seldom erect. One is described as recumbent, seventy cubits long, accompanied by two smaller, standing one at each extremity. The largest statues now known, namely, two in the Memnonium at Thebes, are both in a sitting posture. All these works, even the columnar statues, seem to have been connected with religious rites or symbols. This, together with imperfect science, accounts for the striking similarity discoverable in a class, the individuals of which are thus varied, at least in purpose and magnitude. Another peculiarity is, that in Egyptian sculpture, whenever the dimensions are much beyond nature, the head is always larger than even colossal proportions would require. It would be unreasonable to ascribe to ignorance a practice thus universal; it is to be attributed rather to mistaken principle, in order to render the features more conspicuous, when removed to a distance from the eye. Where similar character and design thus pervade the whole class, minuteness of individual description is unnecessary; we may, however, merely refer, as examples best known, to the two Theban colossi already noticed, one of which, from inscriptions still legible, would appear to be the famous sounding statue of Memnon. In each of these figures, exclusive of the lower plinth of the throne, the altitude is fifty feet, the material red granite, and the positions alike--namely, seated, the head looking straight in front, arms close pressed to the sides, palms and forearm extended and resting upon the thighs, lower extremities perpendicular and apart. This posture, which may be described as characteristic of the entire class, is little calculated to convey any sentiment of ease or grace. Yet in these vast, although comparatively uninformed labours, we discover more of the sublime than arises from mere vastness, or even from the recollections of distant time with which their memory is associated. They are invested with a majestic repose--with a grand and solemn tranquillity, which awes without astonishing; and while they exhibit the greatest perfection to which Egyptian art has attained, in colossal statues generally, we discover occasional approaches to truth and nature, with no inconsiderable feeling of the sweet, the unaffected, and the flowing in expression and contour.