She wrote about her experiences of being an early settler in the book Postlagernd Floreana. Erlebnisbericht deutscher Siedler (1959) (English title: Floreana: A Woman's Pilgrimage to the Galapagos). She returned to Germany in 1960 to present her book.[1]
Margret's book attracted more German tourists to Floreana Island. She built several bungalows to host different tourists and scientists that visited Floreana.[2]
Personal life
Wittmer, her husband Heinz, and her stepson Harry moved to Floreana Island in 1932, following the arrival of German doctor Friedrich Ritter and his wife, Dore Strauch. Wittmer was in the fourth month of her first pregnancy, and she gave birth to a son and a daughter while living on the island.[3]
Death
Margret died on 21 March 2000, 95 years old. She was buried on Floreana Island.