I shall, in fact, leave much of the description and the historic implications of the Proto-Literate assemblage to the conventional historians. Professor T. J. Jacobsen, reaching backward from the legends he finds in the cuneiform writings of slightly later times, can in fact tell you a more complete story of Proto-Literate culture than I can. It should be enough here if I sum up briefly what the excavated archeological evidence shows. We have yet to dig a Proto-Literate site in its entirety, but the indications are that the sites cover areas the size of small cities. In architecture, we know of large and monumental temple structures, which were built on elaborate high terraces. The plans and decoration of these temples follow the pattern set in the Ubaid phase: the chief difference is one of size. The German excavators at the site of Warka reckoned that the construction of only one of the Proto-Literate temple complexes there must have taken 1,500 men, each working a ten-hour day, five years to build. ART AND WRITING If the architecture, even in its monumental forms, can be seen to stem from Ubaidian developments, this is not so with our other evidence of Proto-Literate artistic expression. In relief and applied sculpture, in sculpture in the round, and on the engraved cylinder seals--all of which now make their appearance--several completely new artistic principles are apparent. These include the composition of subject-matter in groups, commemorative scenes, and especially the ability and apparent desire to render the human form and face. Excellent as the animals of the Franco-Cantabrian art may have been (see p. 85), and however handsome were the carefully drafted geometric designs and conventionalized figures on the pottery of the early farmers, there seems to have been, up to this time, a mental block about the drawing of the human figure and especially the human face. We do not yet know what caused this self-consciousness about picturing themselves which seems characteristic of men before the appearance of civilization. We do know that with civilization, the mental block seems to have been removed.