After leaving Denmark in 1857, Alstrup moved to Sweden where he travelled from place to place, much as he had done in his early Danish career. In 1859 he was in Hälsingborg and Kristianstad and in 1860, Gothenburg where he stayed for a few years. In 1863, he practiced in Malmö with G.S. Ekeund. He died in Falun, Sweden, in 1876."Svenska Fotografers Förteckning av anno 1899 resp. 1911. " (PDF file) Retrieved 8 February 2010.
