After the war in the fall of 1945 he moved to Borger, Netherlands where he met and moved in with Hans Heyting in 1946. According to Heyting's biographer, Heyboer had come to Borger after being inspired by reading the letters of Theo and Vincent van Gogh and wanted to come to Drenthe to see the countryside himself.Geschiedenis van de Drentse literatuur, 1816-1956 by Henk Nijkeuter, on Google books Heyboer was so popular with women that they needed to put an alarm near the entrance of the "Groene Kruis" house they were painting in, in order to keep girlfriends from walking in unannounced.Photo of the Groene Kruis house in booklet about the "Groene Kruis" health organisation in 1966 on Google books He helped start the club ”Vereniging Drentse schilders” and began painting intensively. After a year the place became known as "Rembrandtplein". In 1946 Heyboer's work was shown with that of the other "Drentse schilders" in Assen.
