国立情報学研究所 - ディジタル・シルクロード・プロジェクト
『東洋文庫所蔵』貴重書デジタルアーカイブ
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| 0431 |
Innermost Asia : vol.1 |
| 極奥アジア : vol.1 |
引用情報
OCR読み取り結果
signs of moisture in the soil and had a well dug. At only two and a half feet from the surface
water was struck in abundance and, according to Afrāz-gul's statement, 'as fresh as that of any
river'. This completely tallies with what I observed at my own well, more than eight miles farther
up, and makes me inclined to believe that by sinking wells at suitably selected points drinkable
water could even now be found probably on the northern side of the valley as far down as our
Camp cvii.
For about a mile and a half before reaching the point where they came upon the embanked line A well-
above discussed suggestive of an ancient canal, the Surveyors' route led along a well-marked marked old
ancient track, and this, as shown on the map (No. 35. A. 4), they were able to follow, with breaks track.
here and there, for another six miles or so. Considering that near the vicinity of the above point
three small cairns were found on little elevations close above the track, and that another cairn was
noticed about a mile and a half farther to the south-west, similarly near this track, it is difficult to
resist the conclusion that it owed its origin to, or was used by, men. How long ago, it is impossible
to guess. No footprints of wild camels were noticed on or along it, though numerous in the scrubby
belt farther south which affords good grazing.
Of the observations recorded by the Surveyors on their farther progress towards Bēsh-toghrak Belt of
the following may deserve brief notice. To the north-east of Camp 97 their route crossed two broad terraces
Nullahs descending from the hill range and cutting through the gravel-covered clay plateau, carved by
much after the fashion I observed to the east of the present terminal basin of the Su-lo-ho.¹⁰ The wind-
projecting plateau tongues thus produced showed a relative height of 120 to 150 feet. Beyond erosion.
the mouth of the second Nullah a stretch of ground was passed which for about two miles was
covered with Yārdang-like clay terraces from six to twenty-five feet in height. There can be no
doubt that these terraces, all stretching from NNE. to SSW., just like the belt of Mesas I had
myself passed farther to the south-east, were produced by wind-erosion. They obviously represent
the last remnants of former plateau tongues which first had been carved out by drainage from the
hill chain and had been subsequently cut through by the erosive force of the wind. Their origin
was thus exactly the same as that of the clay ridges and Mesas observed in 1907 at a number of
places south of the terminal Su-lo-ho.¹¹
Beyond this belt of Yārdangs and an outlying isolated Mesa a large patch of boggy ground Subsoil
was met with, resembling that I had passed near my Camp cx. Its occurrence here affords further water at
proof of the abundance of subsoil water towards the head of the Bēsh-toghrak valley. At Camp 98, head of
which stood a couple of miles to the south-west of the cliffs facing 'K'ai-mên-kuan', water was valley.
found at two feet from the surface. It proved distinctly brackish, though drinkable, a circumstance
fully accounted for by the fact that the camp stood near the northern edge of an extensive area
where hard shôr mingled with patches of salt-impregnated soil supporting reed-beds. It was
after crossing this ground, no doubt once a bog, for fully four miles that the Surveyors reached
the sandy belt with abundant vegetation which makes Bēsh-toghrak so convenient a place for halts
on the desert journey to Tun-huang.
The account here given of the physical aspects of the ground through which the Lou-lan Levelling
route must have passed after emerging from the Su-lo-ho basin may be appropriately completed operations.
by some observations on the results of Muḥammad Yāqūb's levelling operations. The object
with which I had arranged these was to ascertain whether the assumption suggested to me by the
observations of my previous journey to Tun-huang in 1907, regarding an earlier connexion between
the terminal basin of the Su-lo-ho and the ancient Lop sea-bed,¹² was supported by the configura-
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41
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61
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85
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298
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308
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318
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329
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339
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349
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359
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369
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379
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389
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399
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411
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421
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429
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433
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443
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453
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463
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473
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483
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494
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504
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515
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525
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536
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546
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556
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566
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577
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587
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597
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607
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617
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627
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637
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647
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657
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667
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677
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684
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