This, however, is not the fault of the hills themselves, but of the circumstances just alluded to; for here heroes might have found a field on which to spill whole seas of blood; novelists might have found all the variation of hill, valley, rock, and stream, with which they usually ornament their pages; and Ossian himself, had it been his fortune to travel in the district, might have found "grey mist" and "brown heath" to his heart's content, and, in the proper season, as much snow as would have served to deck out at least half-a-dozen "Morvens" in their winter coat. These hills, on the east and south, rise from the adjoining country by a gradual slope, surmounted, in some instances, by thriving plantations, while, in others, the plough and harrow have reached what appears to be their summit. On the north, they are terminated by a rocky front, which runs nearly parallel to the river Tay, and afterwards to the Earn, thus forming the southern boundary of Strathearn, which is perhaps one of the most fertile districts in Scotland. The elevation on this side is partly composed of the rocky front just mentioned; partly of a cultivated slope at its base; and partly of a green acclivity above, which, when seen from the plain below, seems to crown the whole, while it conceals from the eye those barren altitudes and dreary regions which lie behind. But, after having surmounted this barrier, the prospect which then opens may be regarded as a miniature picture of those more lofty mountain-ranges which are to be found in other parts of the island. Here the ground again declines a little, forming a sort of shoulder upon the ascent, as if the Great Architect of nature had intended thereby to secure the foundation of the superstructure which he was about to rear above. It then rises into frowning eminences, on which nothing seems to vegetate except coarse heath, a few stunted whin-bushes, and, here and there, an _astrogalus_, a _lotus carniculatus_; or a white _orchus_. Those, however, with the exception of the first, are too scanty to produce any effect upon the colouring of the landscape; and the whole looks withered, brown, and, in some instances, even black, in the distance. But, on passing these barren altitudes, or on penetrating one of the gorges by which the central district communicates with the country around, and of which there are several, the eye is saluted with extensive tracts of plantation--some composed of the light-green larch, others of the sombre-looking Scottish pine; and, where the soil is more favourable to the growth of corn, portions of cultivated land, interspersed with streams, giving a fresher green to their banks, clumps of trees standing in sheltered positions, and the isolated habitations of men.