アルダン川
Much of the ensuing leg of the trip employed an established relay network of reindeer teams and drivers. They crossed the Indigirka River at Zashiversk and then proceeded through Abbi (this is presumably Abyy but if so they seem to have taken a circuitous route) to reach Verkhoyansk January 6, 1929. Heading south for Yakutsk, they were asked to carry the mail; this improved their access to reindeer teams but involved traveling day and night. The route to Yakutsk went over Tukulan Pass with a spectacular, precipitous descent into the valley of the Aldan River. At the foot of the pass they switched to horse sleighs and proceeded to Yakutsk. They arrived in Yakutsk January 16. Swenson was held up in Yakutsk four days due to visa problems and then proceeded to Irkutsk, arriving February 9. A dispatch from Moscow to the "New York Times", datelined March 5, reports his trip. The entire trek amounted to over .