Macmillan encouraged Jenssen to try to sail upstream from Khartoum again in 1905, but he was forced to stop 500 kilometres (300 mi) short of Lake Tana.
Macmillan julgustas 1905 Jenssenit jälle Hartumist ülespoole sõitma, kuid ta oloi sunnitud peatuma 300 miili enne T'ana järve.