Original acrylic painting on 12mm birch ply with exposed edges By Michelle Bellamy 200mm Completed 2019 Head of the Arnst, St Arnaud is an acrylic on 12mm birch ply painting. To the left of the scene, the tarns empty into the Arnst River. The Arnst River is a tributary of the Travers River, which itself flows into Lake Rotoiti, in Nelson Lakes National Park.