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Rh A difficult question here arises as to which of these two pairs of apartments is the older—the upper, with the simpler style and the smaller stones, or the apartments with the larger stones and more ornate arrangements. On the whole, I am inclined to think the simpler the older: among other reasons because the floor of the right-hand pair at Mnaidra is 10 feet above the level of the left-hand apartments. As the edifices are all placed on heights, it seems improbable that the first comer would have chosen a site commanded by a knoll 10 feet above him, and touching his half-buried building. But, besides this local indication, it seems probable that the style was progressive, and that this right-hand chamber at Mnaidra may be the oldest, and the great one at Gozo the last completed of all which we know.

The excavations at Mnaidra as well as those at Hagiar Khem have sufficed to settle the question of how these buildings were roofed. The above woodcut, from a photograph, shows the springing of the roof of the north end of the outer left-hand chamber, but, like photographs in general, does so unintelligently.