After returning to the Netherlands, he worked in Maastricht. During this time, he recorded in his diary his difficulty as a Protestant in finding a suitable marriage partner in Roman Catholic Maastricht who would also be able to satisfy his equation v = 1/2m + 10, where v was the age of the woman, and m the age of the husband. In 1882, Escher married Charlotte Marie Hartitzsch, with whom he had two sons. He became a widower in 1885, and in 1892 married Sara Gleichman, with whom he had three more sons. Escher worked as a hydraulic engineer in Leeuwarden. In 1903 the family moved to Arnhem.