ARTHUR'S Seat, a hill in the immediate vicinity of Edinburgh, said to have been so called from a tradition that King Arthur surveyed the country from its summit, and also defeated the Saxons in its neighbourhood. It rises by a steep ascent till it terminates in a rocky point, 822 feet three inches above high-water mark at Leith, as given by Moffat in his Levels of Edinburgh. From its summit the traveller may survey the centre of the kingdom, and obtain a complete view of Edinburgh, the whole forming a landscape varied and beautiful in a very high degree. Its rocky summit has some curious magnetical properties.