The solid foundation of facts proving the condition of the earliest London are the waste, marshy ground, with little hills rising from the plains, and the dense forest on the north—a forest that remained almost up to the walls of the city even in historic times, animal remains, flint instruments, and pile dwellings. All the rest is conjecture. We must call in the aid of geography and geology to understand the laws which governed the formation of London. The position of the town on the River Thames proves the wisdom of those who chose the site, although the swampiness of the land, caused by the daily overflowing of the river before the embankments were thrown up, must have endangered its successful colonisation. When the vast embankment was completed the river receded to its proper bed, and the land which was retrieved was still watered by several streams flowing from the higher ground in the north into the Thames.
Animal remains, very various in character, have been found in different parts of London. Examples of mammoth, elephant, rhinoceros, elk, deer, and many other extinct as well as existing species are represented. Of man, the mass of flint instruments in the 'Palaeolithic floor' which prove his early existence is enormous.
General Pitt Rivers (then Colonel Lane Fox) in 1867 made the discovery of the remains of pile dwellings near London Wall and in Southwark Street. The piles averaged 6 to 8 inches square, others of a smaller size were 4 inches by 3 inches, and one or two were as much as a foot square. They were found in the peat just above the virgin gravel, and with them were found the refuse of kitchen middens and broken pottery of the Roman period. There is reason to believe that the piles were sunk by the Britons rather than by the Romans, and General Pitt Rivers was of opinion that they are the remains of the British capital of Cassivel-,
