The most striking peculiarity which the ground-plans of the palaces disclose is the uniform adoption throughout of straight and parallel lines. No plan exhibits a curve of any kind, or any angle but a right angle. Courts, chambers, and halls are, in most cases, exact rectangles; and even where any variety occurs, it is only by the introduction of squared recesses or projections, which are moreover shallow and infrequent. When a palace has its own special platform, the lines of the building are further exactly parallel with those of the mound on which it is placed; and the parallelism extends to any other detached buildings that there may be anywhere upon the platform. When a mound is occupied by more palaces than one, sometimes this law still obtains, as at Nimrud, where it seems to embrace at any rate the greater number of the palaces; sometimes, as at Koyunjik, the rule ceases to be observed, and the ground-plan of each palace seems formed separately and independently, with no reference to any neighboring edifice. Apart from this feature, the buildings do not affect much regularity. In courts and facades, to a certain extent, there is correspondence; but in the internal arrangements, regularity is decidedly the exception. The two sides of an edifice never correspond; room never answers to room; doorways are rarely in the middle of walls; where a rooms has several doorways, they are seldom opposite to one another, or in situations at all corresponding. There is a great awkwardness in the communications. Very few corridors or passages exist in any of the buildings. Groups of rooms, often amounting to ten or twelve, open into one another; and we find comparatively few rooms to which there is any access except through some other room. Again, whole sets of apartments are sometimes found, between which and the rest of the palace all communication is cut off by thick walls. Another peculiarity in the internal arrangements is the number of doorways in the larger apartments, and their apparently needless multiplication. We constantly find two or even three doorways leading from a court into a hall, or from one hall into a second. It is difficult to see what could be gained by such an arrangement.