Clay offered a combination of facility with durability which no other material could equal. While soft and wet it readily took the shape of any figure impressed upon it. The deftly-handled tool could engrave characters upon its yielding surface almost as fast as the reed could trace them upon papyrus, and much more rapidly than the chisel could cut them in wood. Again, in its final condition as solid terra-cotta, it offered a chance of duration far beyond that of either wood or papyrus. Once safely through the kiln it had nothing to fear short of deliberate destruction. The message intrusted to a terra-cotta slab or cylinder could only be finally lost by the reduction of the latter to powder. At Hillah, the town which now occupies a corner of the vast space once covered by the streets of Babylon, bricks are found built into the walls to this day, upon which the Assyrian scholar may read as he runs the royal style and titles of Nebuchadnezzar.[48]
As civilization progressed, the dwellers upon the Persian Gulf felt an ever-increasing attraction towards the art of writing. It afforded a medium of communication with distant points, and a bond of connection between one generation and another; by its means the son could profit by the accumulated experience of the father. The slab of terra-cotta was the most obvious material for its reception. It cost almost nothing, while such an elaborate substance as the papyrus of Egypt can never have been very cheap. It lent itself kindly to the service demanded of it, and the writer who had confided his thoughts to its surface had only to fire it for an hour or two to secure them a kind of eternity. This latter precaution did not require any very lengthy journey; brick kilns must have blazed day and night from one end of Chaldæa to another.
If we consider for a moment the properties of the material, and examine the remains which have come down to us, we shall understand at once what writing was certain to become under the triple impulse of a desire to write much, to write fast, and to use clay as we moderns use paper. Suppose oneself compelled to trace upon clay figures whose lines necessitated continual changes of direction; at each angle or curve it would be necessary to turn the hand, and with it the tool, because the clay surface, however tender it might be, would still afford a certain amount of resistance. Such resistance would hardly be an obstacle, but it would in some degree diminish the speed with which the tool could be driven. Now, as soon as writing comes into common use, most of those who employ it in the ordinary matters of life have no time to waste. It is important that all hindrances to rapid work should be avoided. The designs of the old writing with their strokes sometimes broken, sometimes continuous, sometimes thick, and sometimes thin, wearied the writer and took much time, and at last it came about that the clay was attacked in a number of short, clear-cut triangular strokes each similar in form to its fellow. As these little depressions had all the same depth and the same shape, and as the hand had neither to change its pressure nor to shift its position, it arrived with practice at an extreme rapidity of execution.
Some have asserted that the instrument with which these marks were made has been found among the Mesopotamian ruins. It is, we are told, a small style in bone or ivory with a bevelled triangular point.[49] And yet when we look with attention at these terra-cotta inscriptions, we fall to doubting whether the hollow marks of which they are composed could have been made by such a point. There is no sign of those scratches which we should expect to find left by a sharp instrument in its process of cutting out and removing part of the clay. The general appearance of the surface leads us rather to think that the strokes were made by thrusting some instrument with a sharp ridge like the corner of a flat rule, into the clay, and that nothing was taken away as in the case of wood or marble, but an impression made by driving back the earth into itself.[50] However this may be, the first element of the cuneiform writing was a hollow incision made by a single movement of the hand, and of a form which may be compared to a greatly elongated triangle. These triangles were sometimes horizontal, sometimes vertical, sometimes oblique, and when arranged in more or less complex groups, could easily furnish all the necessary symbols. In early ages, the elements of some of these ideographic or phonetic signs—signs which afterwards became mere complex groups of wedges—were so arranged as to suggest the primitive forms—that is, the more or less roughly blocked out images—from which they had originally sprung. The fish may easily be recognized in the following group
: while the character that stands for the sun,
, reminds us of the lozenge which was the primitive sign for that luminary. In the two symbols
and