Recently Ausgewählte Arbeiten der Kreolistik des 19. Jahrhunderts, Selected Works form 19th Century Creolistics, Emilio Teza, Thomas Russell, Erik Pontoppidan, Adolpho Coelho appeared, edited by Philipp Krämer (Universität Potsdam).
In relation to Negerhollands, it contains both articles of Erik Pontoppidan (Zeitschrift für Ethnologie 1881 and Tilskueren 1887). The first one was originally published in German. The second one is translated into German by Philipp Krämer. 1)
Two articles accompany Pontoppidan’s material: Peter Stein ‘Dr. Med. Erik Pontoppidan und das Negerhollands’ (p. 109-121) and Magdalena von Sicard ‘Die kreolische Oralliteratur: eine Kultur des Winderstandes?’ (p. 123-142).
1. An English translation of both of Pontoppidan’s articles is published by Sabino (2012: 209-232).