Career
Possibly her most popular novel was the 1963 Children on the Oregon Trail (De Kinderkaravaan), an account of a family of children traveling with a pioneer caravan to Oregon in the mid-19th century, loosely based on the real incident of the Sager orphans. Another popular novel was her 1958 Avalanche, a story of a group of children from an orphanage caught up in heavy snowfall in Switzerland.