Meanwhile, dividing the two cantons, the broad white causeway of the Paris road runs in an avenue: a road conceived for pageantry and for triumphal marches, an avenue for an army; but, its days of glory over, it now lies grilling in the sun between cool groves, and only at intervals the vehicle of the cruising tourist is seen far away and faintly audible along its ample sweep. A little upon one side, and you find a district of sand and birch and boulder; a little upon the other lies the valley of Apremont, all juniper and heather; and close beyond that you may walk into a zone of pine trees. So artfully are the ingredients mingled. Nor must it be forgotten that, in all this part, you come continually forth upon a hilltop, and behold the plain, northward and westward, like an unrefulgent sea; nor that all day long the shadows keep changing; and at last, to the red fires of sunset, night succeeds, and with the night a new forest, full of whisper, gloom, and fragrance. There are few things more renovating than to leave Paris, the lamplit arches of the Carrousel, and the long alignment of the glittering streets, and to bathe the senses in this fragrant darkness of the wood.