At 4 A.M. we moved off across the glacier in single file towards the foot of a great gully, which led from the upper slopes of the glacier de la Bonne Pierre, to the lowest point in the ridge that runs from the Ecrins to the mountain called Roche Faurio,—cheered by Rodier, who now returned with his wraps to La Bérarde. This gully (or couloir) was discovered and descended by Mr. Tuckett, and we will now return for a minute to the explorations of that accomplished mountaineer.
In the year 1862 he had the good fortune to obtain from the Dépôt de la Guerre at Paris, a MS. copy of the then unpublished sheet 189 of the map of France, and with it in hand, he swept backwards and forwards across the central Dauphiné Alps, untroubled by the doubts as to the identity of peaks, which had perplexed Mr. Macdonald and myself in 1861; and, enlightened by it, he was able to point out (which he did in the fairest manner) that we had confounded the Ecrins with another mountain—the Pic Sans Nom. We made this blunder through imperfect knowledge of the district and inaccurate reports of the natives;—but it was not an extraordinary one (the two mountains are not unlike each other), considering the difficulty that there is in obtaining from any except the very highest summits a complete view of this intricate group.
The situations of the principal summits can be perceived at a [pg 149]glance on the [accompanying map], which is a reproduction of a portion of sheet 189. The main ridge of the chain runs, at this part, nearly north and south. Roche Faurio, at the northern extreme, is 3716 mètres, or 12,192 feet, above the level of the sea. The lowest point between that mountain and the Ecrins (the Col des Ecrins) is 11,000 feet. The ridge again rises, and passes 13,000 feet in the neighbourhood of the Ecrins. The highest summit of that mountain (13,462 feet) is, however, placed a little to the east of and off the main ridge. It then again falls, and in the vicinity of the Col de la Tempe it is, perhaps, below 11,000 feet; but immediately to the south of the summit of that pass, there is upon the ridge a point which has been determined by the French surveyors to be 12,323 feet. This peak is without a name. The ridge continues to gain height as we come to the south, and culminates in the mountain which the French surveyors have called Sommet de l’Aile Froide. On the spot it is called, very commonly, the Aléfroide.
There is some uncertainty respecting the elevation of this mountain. The Frenchmen give 3925 mètres (12,878) as its highest point, but Mr. Tuckett, who took a good theodolite to the top of Mont Pelvoux (which he agreed with his predecessors had an elevation of 12,973 feet), found that the summit of the Aléfroide was elevated above his station 4′; and as the distance between the two points was 12,467 feet, this would represent a difference in altitude of 5 mètres in favour of the Aléfroide. I saw this mountain from the summit of Mont Pelvoux in 1861, and was in doubt as to which of the two was the higher, and in 1864, from the summit of the Pointe des Ecrins (as will presently be related), it looked actually higher than Mont Pelvoux. I have therefore little doubt but that Mr. Tuckett is right in believing the Aléfroide to have an elevation of about 13,000 feet, instead of 12,878, as determined by the French surveyors.
Mont Pelvoux is to the east of the Aléfroide and off the main ridge, and the Pic Sans Nom (12,845 feet) is placed between these two mountains. The latter is one of the grandest of the Dauphiné [pg 150]peaks, but it is shut in by the other mountains, and is seldom seen except from a distance, and then is usually confounded with the neighbouring summits. Its name has been accidentally omitted on the map, but its situation is represented by the large patch of rocks, nearly surrounded by glaciers, that is seen between the words Ailefroide and Mt. Pelvoux.
The lowest depression on the main ridge to the south of the Aléfroide is the Col du Selé, and this, according to Mr. Tuckett, is 10,834 feet. The ridge soon rises again, and, a little farther to the south, joins another ridge running nearly east and west. To a mountain at the junction of these two ridges the Frenchmen have given the singular name Crête des Bœufs Rouges! The highest point hereabouts is 11,332 feet; and a little to the west there is another peak (Mont Bans) of 11,979 feet. The main ridge runs from this last-named point, in a north-westerly direction, to the Cols de Says, both of which exceed 10,000 feet.
It will thus be seen that the general elevation of this main ridge is almost equal to that of the range of Mont Blanc, or of the central Pennine Alps; and if we were to follow it out more completely, or to follow the other ridges surrounding or radiating from it, we should find that there is a remarkable absence, throughout the entire district, of low gaps and depressions, and that there are an extraordinary number of peaks of medium elevation.[107] The difficulty which explorers have experienced in Dauphiné in identifying peaks, has very much arisen from the elevation of the ridges generally being more uniform than is commonly found in the Alps, and the consequent facile concealment of one point by another. The difficulty has been enhanced by the narrowness and erratic courses of the valleys.
The possession of the “advanced copy” of sheet 189 of the French map, enabled Mr. Tuckett to grasp most of what I have just [pg 151]said, and much more; and he added, in 1862, three interesting passes across this part of the chain to those already known. The first, from Ville Vallouise to La Bérarde, viâ the village of Claux, and the glaciers du Selé and de la Pilatte,—this he called the Col du Selé; the second, between Ville Vallouise and Villar d’Arène (on the Lautaret road) viâ Claux and the glaciers Blanc and d’Arsine,—the Col du Glacier Blanc; and the third, from Vallouise to La Bérarde, viâ the Glacier Blanc, the Glacier de l’Encula, and the Glacier de la Bonne Pierre, the Col des Ecrins.
This last pass was discovered accidentally. Mr. Tuckett set out intending to endeavour to ascend the Pointe des Ecrins, but circumstances were against him, as he relates in the following words:—“Arrived on the plateau” (of the Glacier de l’Encula), “a most striking view of the Ecrins burst upon us, and a hasty inspection encouraged us to hope that its ascent would be practicable. On the sides of La Bérarde and the Glacier Noir it presents, as has been already stated, the most precipitous and inaccessible faces that can well be conceived; but in the direction of the Glacier de l’Encula, as the upper plateau of the Glacier Blanc is named on the French map, the slopes are less rapid, and immense masses of névé and séracs cover it nearly to the summit.”
“The snow was in very bad order, and as we sank at each step above the knee, it soon became evident that our prospects of success were extremely doubtful. A nearer approach, too, disclosed traces of fresh avalanches, and after much deliberation and a careful examination through the telescope, it was decided that the chances in our favour were too small to render it desirable to waste time in the attempt.... I examined the map, from which I perceived that the glacier seen through the gap” (in the ridge running from Roche Faurio to the Ecrins) “to the west, at a great depth below, must be that of La Bonne Pierre; and if a descent to its head was practicable, a passage might probably be effected to La Bérarde. On suggesting to Croz and Perrn that, though baffled by the state of the snow on the Ecrins, we might [pg 152]still achieve something of interest and importance by discovering a new col, they both heartily assented, and in a few minutes Perrn was over the edge, and cutting his way down the rather formidable couloir,” etc. etc.[108]