When Tim first began his work it was summertime, and the nights were so balmy, and soft, and light that it was not so very difficult to keep awake--there seemed so many other thing's awake too. After they were well out of London, and the horses no longer clattered noisily over the stones, it was like getting into another world. The stars looked brightly down from the clear smokeless sky. Soft little winds blew a thousand flowery scents from over the fields, and sometimes, singing quite close to the road, Tim heard the nightingale. Even Joshua, a gruff man, was affected by the sweet influence of the season, for Tim noticed that he always sang one particular song on fine nights in summer. Joshua's voice was hoarse from much exposure to weather, but Tim thought he sang with great expression. The words were not easy to follow, because the middle of the verse always became inaudible; but by degrees the boy made out that it was the description of a letter received by a rustic from his sweetheart. It began: "All _on_ a summer's day As _I_ pursued my way." Then came some lines impossible to hear, and then each verse ended with: "Com--_men_cing with `my dearest,' And con--_clu_ding with her name--" Joshua's song and the steady tramp, tramp of the horses were sometimes the only sounds disturbing the still night, and Tim, a small erect figure with widely opened eyes, would sit perched on a convenient packing-case at the back of the cart, and listen admiringly. But the winter! That was another matter. Joshua did not sing then, but kept his teeth clenched, and his head bent, before the sleet, or wind, or driving rain. Then the brightly lighted London streets seemed cheerful, and much to be preferred to the lonely open country, where the bitter wind swept across the wide fields, and, gathering strength as it came, rushed in among Tim and the parcels. That was hard to bear, but of all kinds of weather, and he knew them all pretty well now, he thought the very worst was a fog. It was not only that it penetrated everywhere, and laid its cold damp finger on everything; but it spread such a thick veil of dreadful mystery over well-known objects. Nothing looked the same. The houses in the streets towered up like giant castles, and if Tim had read fairy tales he might well have fancied them inhabited by ogres. But he had not. He only felt a dim sense of discomfort and fear, as though he were lost in a strange place. Then it was a comfort to know that Joshua was there, almost invisible indeed, but making himself evident by hoarse shouts, now of encouragement to his horses, and now of derision at some luckless driver. Out in the country, when the heavily laden market carts loomed slowly out of the fog as they passed, they had the appearance of being miles up in the air, and as if they must inevitably topple over. Joshua knew all the carters, not by sight, for he could not see them, but by the time and