In 1837 and 1838 the Copenhagen Art Union ("Kunstforening"), under the leadership of Høyen, purchased several of his paintings. And in 1839 the Danish Royal Painting Collection ("Den kongelige Malerisamling") purchased the large scale "Udsigt mod Frederiksværk fra Tisvilde Skov" (View to Frederiksværk from Tisvilde Forest). This work distinguishes itself clearly from those landscapes painted by his contemporaries both by the harsh wildness of the subject matter, and by its dark moodiness. This was also atypical of his later work, which was much more peaceful.