Its effect was still upon the slippery and shining road, the sky was still fast and leaden, when, in a distaste for their towns, I skirted the place by a lane that runs westward of the houses, and sitting upon a low wall, I looked up at the Apennines, which were now plain above me, and thought over my approaching passage through those hills. But here I must make clear by a map the mass of mountains which I was about to attempt, and in which I forded so many rivers, met so many strange men and beasts, saw such unaccountable sights, was imprisoned, starved, frozen, haunted, delighted, burnt up, and finally refreshed in Tuscany--in a word, where I had the most extraordinary and unheard-of adventures that ever diversified the life of man. The straight line to Rome runs from Milan not quite through Piacenza, but within a mile or two of that city. Then it runs across the first folds of the Apennines, and gradually diverges from the Emilian Way. It was not possible to follow this part of the line exactly, for there was no kind of track. But by following the Emilian Way for several miles (as I had done), and by leaving it at the right moment, it was possible to strike the straight line again near a village called Medesano. Now on the far side of the Apennines, beyond their main crest, there happens, most providentially, to be a river called the Serchio, whose valley is fairly straight and points down directly to Rome. To follow this valley would be practically to follow the line to Rome, and it struck the Tuscan plain not far from Lucca. But to get from the Emilian Way over the eastern slope of the Apennines' main ridge and crest, to where the Serchio rises on the western side, is a very difficult matter. The few roads across the Apennines cut my track at right angles, and were therefore useless. In order to strike the watershed at the sources of the Serchio it was necessary to go obliquely across a torrent and four rivers (the Taro, the Parma, the Enza, and the Secchia), and to climb the four spurs that divided them; crossing each nearer to the principal chain as I advanced until, after the Secchia, the next climb would be that of the central crest itself, on the far side of which I should find the Serchio valley. Perhaps in places roads might correspond to this track. Certainly the bulk of it would be mule-paths or rough gullies--how much I could not tell. The only way I could work it with my wretched map was to note the names of towns' or hamlets more or less on the line, and to pick my way from one to another. I wrote them down as follows: Fornovo, Calestano, Tizzano, Colagna--the last at the foot of the final pass. The distance to that pass as the crow flies was only a little more than thirty miles. So exceedingly difficult was the task that it took me over two days. Till I reached Fornovo beyond the Taro, I was not really in the hills.