Meanwhile, a nationalistic movement strove for the development of a new written Norwegian. Ivar Aasen, a botanist and self-taught linguist, began his work to create a new Norwegian language at the age of 22. He traveled around the country collecting words and examples of grammar from the dialects and comparing the dialects among the different regions. He examined the development of Icelandic, which had largely escaped the influences under which Norwegian had come. He called his work, which was published in several books from 1848 to 1873, Landsml, meaning 'national language'. The name Landsml is sometimes interpreted as 'rural language' or 'country language', but this was clearly not Aasen's intended meaning.