Recherche dans la collection - No. 23 - Looking west towards Kystabyt Mt. Range, the Oimyakonskow plateau, showing river in foreground, probably the headwaters of the Kolyma also sparsely timbered lower hills, ice-filled lakes. Looks very arid. From 12-14000 ft. elevation plane. (page 19) No. 24 - Farther west the range becomes more rugged.(page 19)