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In page Mikhail Lomonosov:

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Contrary to his adoration for Wolff, Lomonosov had fierce disputes with Henckel over the training and education courses he and his two compatriot students were getting in Freiberg, as well as over very limited financial support which Henckel was instructed to provide to the Russians after numerous debts they had accumulated in Marburg. As the result, Lomonosov left Freiberg without permission and wandered for quite a while over Germany and Holland, unsuccessfully trying to obtain permission from Russian envoys to return to the St. Petersburg Academy.[citation needed]