The Port de Venasque again, though but a mule track, is constantly used, and, though steep and high (close upon 8000 feet), presents no difficulties at all, and is almost a highway between the two countries. The Port de Gavarnie is similarly constantly used and may be taken like any other mountain path. Certain other passes form an intermediate category. They present no difficulties to one who is acquainted with the neighbourhood, but either the whole path is difficult to trace or its last and highest portion is dangerous, or there are precipices upon its lower slope, or in one way and another they cannot be regarded as constant and regular communications of international travel, though the inhabitants use them continually. Of such a kind is the Port d’Ourdayte; of such a kind are the passages from the Aston into Andorra, and of such a kind are most of the passages just west of the Port de Venasque. If one applied the test of asking where the Pyrenees could be crossed in doubtful weather, not half a dozen places could be found beyond the four high roads; and even if one were to ask in what spots they could certainly be crossed by a stranger without chance of failure, the number of passages would prove less than a score. All the rest of the ridge from the Sierra del Cadi to the Basque mountains is the rocky wall I have described, with innumerable notches more or less practicable, but all difficult, and nearly all requiring a detailed knowledge of either slope.
There are one or two other features needing explanation before I close this introduction to a physical knowledge of the range; thus the reader should be acquainted with the many groups of lakes and tarns which stand just under the highest peaks and ridges in groups: they are highly characteristic of the Pyrenees. There is a cluster of half a dozen at the western base of the Pic du Midi d’Ossau, another cluster surrounding the neighbourhood of Panticosa, another in the summit of the Encantados between the Maladetta group and the valley of the Noguera, another very famous one well known to fishermen high up in the knot of mountains whose summit is the Carlitte, and there are many isolated small lakes which the map discovers. But whether in groups or isolated, one feature is common to all these lakes of the Pyrenees—first, that none is of any size; secondly, that all, or very nearly all, are quite in the highest parts of the hills immediately under the last escarpment; and thirdly, as a consequence, that it is rare to find a lake which the presence of wood and the neighbourhood of habitation render suitable for camping.
It is worth remembering that, unlike most mountain systems, the Pyrenees do not, even in sudden storms, endanger one as a rule by a rapid increase in size of the torrents; one has not to fear spates so much as one might imagine from the multiplicity of the streams on the northern side or the large area of the valleys on the southern. This truth, of course, must not be exaggerated nor too much advantage taken of it. That part of a stream which will be just traversable after several fine days may become just too violent to cross after a few hours of rain, but I have never seen those sudden changes of level from a rivulet to a considerable torrent which one may so often see in British mountains, which are common enough in Scandinavia and even in the Alps, and which are a regular condition of travel in the Rockies.
Why this should be so it would be difficult to say. The great area of forest upon the north might account for regularity upon that slope, but it would not account for it upon the Spanish side. And one would imagine that snow in large masses, which is lacking in the Pyrenees and present in the Alps, would rather tend to regulate the flow of rivers; but whatever be the cause, the evenness of level is what one used to other ranges will first remark when he has to cross and recross under different conditions the higher streams of this chain in summer.
There should lastly be noted the absence of any important glaciers, a feature due to the absence of snow-fields. On the summit of the Cirque de Gavarnie, on the summits of the Pic d’Enfer and the neighbourhood, on the summits of the Maladetta group, and in one or two other parts, there are small glaciers, but they form no general feature in the landscape of the Pyrenees, and have no effect upon travel.
Lastly, the climate of these mountains should be noted: it is a very important part of the conditions which determine travel upon them.
The rain-bearing winds blow from the Atlantic eastward, and if the Pyrenees stood upon either slope equally accessible to the sea, it is possible that the Spanish side would be the more deeply wooded and the best watered. The sudden trend westward of the Spanish coast, however, at the corner of the Bay of Biscay, causes the wet winds from the Ocean to lose most of their moisture to Galicia and the Asturias, before they can strike the Pyrenees themselves from the south, while the same winds, coming around the range from the north, come upon the Pyrenees immediately after leaving the sea. The result of this is that the French side is throughout its length more heavily watered than the Spanish side; but on either side there are three zones which, though not sharply distinguishable one from the other, are sufficiently remarkable.
The first is that of heavy rains, and, what is more important for purposes of travel, of continuous rain and frequent mist. It stretches all along the western end of the range, and only begins perceptibly to change with the heights of the Pic d’Anie and the precipitous barrier of the upper valley of the Aspe. West of this line—that is, in all the Basque-speaking country—you have deep pastures upon either side of the range, and all the marks of the damp in the timber and the mode of building, the vegetable growth and the animals of the place. Snow falls later here than in the other parts of the Pyrenees, for the double reason that the neighbourhood of the sea makes the climate milder and that the hills are less high. In most places, for instance, communication is not cut off between the north and south valleys of the Basques, and men can usually cross from Ste. Engrace to Isaba at all seasons.
The next zone (the eastern frontier of which is very vague) may be said to stretch, according to the year and the accident of weather, certainly as far as the Catalans and the valley of the Noguera on the east, and sometimes as far as the valley of the Segre itself. In all this central part of the range (which may normally be said to include more than half its length) the French or northern side is densely wooded and heavily watered, the Spanish side more dry and bare; but even the French side slowly shows a change of climate as one goes eastward, the forests remain as dense, the rivers as full, but the days are certainly finer and mist less frequent. On the Spanish side the change as one goes eastward is less striking, because the whole climate is drier. It is to be remarked that if mist gathers upon the northern side of the hills when one is attempting a pass, one may fairly count upon its disappearance upon the Spanish side in this section; and, in general, the whole of the southern slope, from the valley of the Aragon to that of the Noguera, is of a dry and equal nature, somewhat barren and burnt, not only from the lack of moisture, but also from exposure to the sun.