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MUD AS A BUILDING MATERIAL.
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we are so familiar with on the Assyrian sculptures. There is the same repetition of crenelated wall and tower, and constructed of the same material. I said to myself, "These men, in the present
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/f9/PSM_V41_D793_Stone_door_lasgird.jpg/420px-PSM_V41_D793_Stone_door_lasgird.jpg)
Fig. 1.—Stone Door, Lasgird.
day, are building an old Assyrian wall of fortification." Such defenses must have begun at a very early date in Mesopotamia, long before the sculptures were produced from which we know what they were in appearance, and their construction