With their help (Czekanowski is considered his mentor) he joined the Russian Geographical Society, got a job at a local museum and took part in several expeditions, gaining experience and prominence.
(Czekanowski is considered his mentor) he joined the Russian Geographical Society. This was with their help. (Czekanowski is considered his mentor) he got a job at a local museum. This was with their help. (Czekanowski is considered his mentor) he took part in several expeditions. This was with their help. (Czekanowski is considered his mentor) he was gaining experience and prominence. This was with their help.