His first article in the field, Stormene i Christiania fra 1837 til 1863 was published in 1863 in the journal Polyteknisk Tidsskrift, which he had edited from 1859 to 1862.
Jeho první článek z oboru, Stormene i Christiania fra 1837 til 1863, byl zveřejněn v roce 1863 v deníku Polyteknisk Tidsskrift, jehož byl editorem v letech 1859 až 1862.