To all appearance the dome was lined internally with plates of brass or bronze, some nails of which metals are now found there; and the holes in which the nails were inserted are still to be seen all over the place. A second tomb or treasury of smaller dimensions was discovered by Dr. Schliemann in 1878. Another of these tombs, erected by Minyas at Orchomenos, described by Pausanias as one of the wonders of Greece,[125] seems from the remains still existing to have been at least 20 ft. wider than this one, and proportionably larger in every respect. All these were covered with earth, and some are probably still hidden which a diligent search might reveal. In fact Dr. Schliemann’s discoveries in the Acropolis of Mycenæ and in the Troad prove that it is still possible to discover an unrifled tomb even in Greece. As domes constructed on the horizontal principle, these three are the largest of which we have any knowledge, though there does not appear to be any reasonable limit to the extent to which such a form of building might be carried. When backed by earth,[126] as these were, it is evident, from the mode of construction, that they cannot be destroyed by any equable pressure exerted from the exterior. The only danger to be feared is, what is technically called a rising of the haunches; and to avoid this it might be necessary, where large domes were attempted, to adopt a form more nearly conical than that used at Mycenæ. This might be a less pleasing architectural feature, but it is constructively a better one than the form of the radiating domes we generally employ. It is certainly to be regretted that more of the decorative features of this early style have not been discovered. They differ so entirely from anything else in Greece, and are so purely Asiatic in form, that it would be exceedingly interesting to be able to restore a complete decoration of any sort. In all the parts hitherto brought to light, an Ionic-like scroll is repeated in every part and over every detail, rather rudely executed, but probably originally heightened by colour. Its counterparts are found in Assyria and at Persepolis, but nowhere else in Greece.[127] [Illustration: 126. Gateway at Thoricus. (From Dodwell’s ‘Greece.’)] The Pelasgic races soon learnt to adopt for their doorways the more pleasing curvilinear form with which they were already familiar from their interiors. The annexed illustration (Woodcut No. 126) from a gateway at Thoricus, in Attica, serves to show its simplest and earliest form; and the illustration (Woodcut No. 129) from Assos, in Asia Minor, of a far more modern date, shows the most complicated form it took in ancient times. In this last instance it is merely a discharging arch, and so little fitted for the purpose to which it is applied, that we can only suppose that its adoption arose from a strong predilection for this shape.