His breakthrough as illustrator was the children"s book Norsk Billedbog for Børn by Elling Holst from 1888, which is regarded as the first colored picture book in Norway. The book became widely popular and has been reprinted numerous times (the 17th edition was issued in 1998). He also illustrated the sequels from 1890 and 1903.
In total he illustrated 38 books
He is also known for his ceiling decorations in the Nationaltheatret. He lectured at the Statens Håndverksog Kunstindustriskole from 1890 to 1934.