Besides these main apartments, the edifice which we are describing contained a certain number of small rooms, lying behind the halls, and entered by doorways opening from them. One or two such rooms are found behind each of the smaller halls; and another of somewhat larger dimensions lay behind the great hall (numbered VII. in the plan), forming the extreme north-western corner of the building. These rooms were vaulted and had no windows, receiving their only light from the small doorways by which they were entered. It is believed that the entire edifice, or at any rate the greater portion of it, had an upper story. Traces of such a structure appear over the halls numbered I and VI.; and it is thought that the story extended over the entire range of halls. One traveller, on conjectural grounds, even assigns to the building an elevation of three stories, and ventures to restore the second and third in the mode represented in the woodcut. [PLATE V. Fig. 2.] According to this author the upper portion of the edifice resembled in many respects the great palace of the Sassanian monarchs, of which splendid remains still exist on the site of Ctesiphon, where they are known as the Takht-i-Khuzroo, or Palace of Chosroes. That palace was, however, on a very different plan from the Hatra one, comprising as it did one hall only, but of a size vastly superior to any of those at Hatra, and two wings, one on either side of the hall, made up of dwelling and sleeping apartments. The few windows which exist at Hatra are oblong square in shape, as in general are the doorways connecting one apartment with another. In one case there is an arched doorway, or niche, which has been blocked up. There are no passages except the one which surrounds “the Temple,” the apartments generally leading directly one into another. In some cases the lintel of a doorway is formed of a single stone, and ornamented with very delicate carving. The doorways are for the most part towards the corners of apartments; that of the Temple, however, is in the centre of its eastern wall.