English transcription (name:en) derived from original تازغۇن.

name:en and name:ru given as transcriptions of Chinese and Uygur "ياپچان / 牙甫泉"; ref. for German name (name:de) = W. Filchner, Ein Ritt über den Pamir, Berlin 1903, p. 156.

Error corrected: Reading of Chinese vs Russian spelling shows: "艾古斯乡" is NOT "Эпчикайрык". Thus, I have adopted data of Russian/Soviet map J-43 to DISTINGUISH "艾古斯乡=Эгус/Egus, Айгут/Aygut, and Эпчикайрык/Epchikayryk.

name of Yarsu river (ref.: Russian/Soviet map J-43)

Russian spelling as given by Russian/Soviet map J-43; English spelling adjusted to "original" Kyrgyz name (= with same spelling as name:ru)

Russian spelling as given by Russian/Soviet map J-43

English spelling adjusted to "original" Kyrgyz name (= with same spelling as name:ru)

Position / name of village by Russian/Soviet map J-43.

Position of Aktala village shifted following (1) W. Filchner, Ein Ritt über den Pamir, Berlin 1903, p. 145: "elevation < 2300m" (2) locality addressed as "урочище Актала" in www.risk.ru/blog/207246.

Position / name of settlement by ref.: (1) W. Filchner, Ein Ritt über den Pamir, Berlin 1903, p. 145; (2) Russian/Soviet map J-43.

Position / name of settlement on elevation=3370m by ref.: W. Filchner, Ein Ritt über den Pamir, Berlin 1903, p. 140.

.

Койелыдаван = name also for upper (south-western) course of this river/creek (ref.: Russian/Soviet map J-43)

track northth of Койелыдаван

creeks south of Койелыдаван

creeks

slight shift of pass' position

slight shift of pass' position

creek

few more creeks