His long stay in Britain made him familiar with the best in British and German geography, and he was fluent in both languages (he had also learned French, which was a prerequisite to attend Berghaus' school), which helped him to read as widely as necessary for his further career. His love for the exploration of the polar regions probably started in London, for many of the polar explorers, especially after the disappearance of the Franklin expedition, presented their discoveries to the Royal Geographical Society. From 1848 onward he published, among other things, the following articles and maps with English publishers or in English language journals: