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RV 36 (ROADS INTO LONDON) But nowadays we may say that London begins where tree trunks commence to be black, otherwise there is very little to distinguish Regent's Park from Penshurst, or Wimbledon from Norwich. This tree-trunk boundary is, however, defective enough; in many parts of Epping the wood is so dense that boughs and the boulders are as green, as brown, as mossy or as lichened as at Fontainebleau. The prevailing winds being from the south and from the westwards, again, the zone of blackened trunks extends further than is fair towards the north and the east. But judged by this standard, London, as far as I have been able to observe, is bounded by a line drawn from Leigh, in Essex, halfway through the Epping Forest, to the north of Hendon, to the west of Brentford, the southwest of Barnes, well to the south of Sydenham, well to the east of Bromley, and so up to Leigh again. Other observers will, no doubt, find this tree-trunk limitation a little faulty; but it takes in at least nearly all the looser elements of the sphere of London influence. And, as the invariable and bewildering exception to this, as to all rules, it may as well be set down that the most 'Londony' of all London trees has a bark that is never uniformly black. The plane tree grows best of all in London, because it sheds its bark continually; getting rid of its soot it clears the pores of its skin and flourishes, if I may be allowed an image that appears frivolous but that is sober enough, a perpetual emblem to the city of the morning tub. In the suburbs the plane yields first place to the flowering almond, in the 36