But it was not only the friends and followers of Ra who thus accompanied him in his journey through the other world; his enemies were there also, and the horrible punishments they had to endure, as depicted on the walls of the royal tombs, were worthy of the imagination of a Dante. The banks of the infernal river were lined with strange and terrible monsters, some of them the older deities and spirits of the popular creed, others mere creations of symbolism, others creatures of composite form to whose invention the older mythology contributed. Fire-breathing serpents are prominent among them, lighting up the darkness for the friends of Ra, and burning his foes with their poisonous flames.(161) The artificial character of this picture of the other world is clear at the first glance. With the pedantic attention to details which characterised the Egyptian, every part of it has been carefully elaborated. The names and forms of the personages who stand on the banks of the infernal river or enter the boat of Ra, as with each successive hour he passes into a new region, are all given; even the exact area of each region is stated, though the measurements do not agree in all the versions of the book. But the best proof of its artificial nature is to be found in a fact first pointed out by Professor Maspero. Two of the older conceptions of the other world and the life beyond the grave, which differed essentially from the solar doctrine, are embedded in it, but embedded as it were perforce. In the fourth and fifth hours or regions we have a picture of the future life as it was conceived by the worshippers of Sokaris in the primitive days of Memphis; in the sixth and seventh, the tribunal and paradise of Osiris.