1.] It is at once the most central and the loftiest ruin in the place.

At first sight it appears to have been a cone or pyramid; but further examination proves that it was in reality a tower, 200 feet square at the base, built in two stories, the lower story being composed entirely of sun-dried bricks laid in mud, and protected at intervals of four or five feet by layers of reeds, while the upper one was composed of the same material, faced with burnt brick.

Of the upper stage very little remains; and this little is of a later date than the inferior story, which bears marks of a very high antiquity.

The sundried bricks whereof the lower story is composed are "rudely moulded of very incoherent earth, mixed with fragments of pottery and fresh-water shells," and vary in size and shape, being sometimes square, seven inches each way; sometimes oblong, nine inches by seven, and from three to three and a half inches thick.

The whole present height of the building is estimated at 100 feet above the level of the plain.