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

enough by a row of five small 'P'ao-t'ais', such as usually adorn main stages on the modern Chinese
high roads of these parts and of Hsin-chiang. It was a curious sign of administrative attention
extended to the river's right bank where no definite track could be seen, though camel caravans
probably descend along it on occasion to An-hsi. Three miles farther on we reached a small
ruin, T. XL. a, lying close to the river and almost exactly opposite to the above-mentioned two
towers on the left bank. It consisted, as the plan Pl. 14 shows, of a small walled enclosure, about
19½ feet square inside, with a tower 8½ feet square at its north-eastern corner. This tower, built
of bricks of the size usual in structures of the Han Limes, 13 inches by 7 and 4 inches in thickness,
bore a distinctly ancient look. In order to strengthen it, walls of later construction had been added
to it on the north and south. The walls of the enclosure seemed of later date and moreover showed
clear signs of repairs. The addition, usually at a later period, of walled enclosures to watch-towers
is of frequent occurrence along the Limes on both sides of Tun-huang, and there are examples of
it also at other watch-stations farther east.⁶ The examination of what refuse was traceable near
the north wall and in the little conning room on the top of the tower yielded no dateable remains ;
nor were ancient potsherds found in the sandy soil outside.

Another tower, T. XL. b, was within sight about two miles' distant to the east, at the entrance Towers
of the gorge-like portion of the defile. Above it there rose a third tower, T. XL. c, conspicuously T. XL. a, b.
placed on the top of a bold hill, which forms the last projection of the spur overlooking the river sighted.
from the north and facing Wan-shan-tzŭ. On moving towards T. XL. b we passed over gently
rising ground, where the bare clay was completely furrowed into Yārdangs running from ENE.
to WSW. and from 5 to 7 feet in height.

We had covered about half the distance to T. XL. b when a dark line of gravel crossing the eroded Remains of
ground on our right towards the river attracted our attention. On reaching its western end it proved agger.
to be an unmistakable agger, running with a bearing of S. 100° E. towards the eastern end of the
defile. The bank, thickly covered with gravel, was about 34 feet wide at the foot and about 9 feet
at the top and rose to about 8 or 9 feet. To the north of the agger a shallow ditch about 10 feet
wide at its bottom marked the ground from which earth had been dug to form the mound. No
trace of fascines or other reinforcing material could be found in the construction of the latter. On
the opposite side of the ditch ran what appeared to be a smaller mound, nowhere more than about
5 feet in height, forming a kind of counterscarp. The direction of the agger pointed straight towards
T. XL. a, though farther west wind-erosion had completely effaced its remains. There could be
no doubt any longer that it was there that the Limes had been carried across the river.

Having followed the line of the agger for over half a mile we turned to the watch-tower T. XL. b Watch-
(Fig. 205) rising a short distance to the north of it on higher ground. It proved to be exactly of the tower
type of the towers guarding the Tun-huang Limes and had remained in remarkable preservation. T. XL. b.
It measured 20 feet square at its base, was built of solid layers of stamped clay, 6 inches thick, and
still rose to 26 feet in height. Plenty of mat-marked dark potsherds lay around it, also many large
stones which might once have been stored on the top for defence.⁷ A well-preserved Wu-chu coin
of the large type was picked up close to the tower.

I next ascended the steep detritus-covered spur which rises to the north of the defile. Small View com-
water-cut Nullahs fissure its slopes on all sides ; but the surface of the narrow ridges between can manded
have suffered little change, as proved by the clear traces at many points of an old track ascending from spur.
to the top. This was found by clinometric readings to rise more than 300 feet above the riverine
flat. The view from the summit was very extensive. It comprised the whole of the defile and the
broad valley eastwards as far as the great circumvallation of Bulungir (Map No. 40. B. 4). The