author
A rare early-20th-century voice in Dutch exploration writing, best known for a firsthand account of journeys through New Guinea. The surviving record is slim, which gives this work an added sense of discovery and historical curiosity.

by J. W. Langeler, L. A. C. M. (Ludovicus Antonius Carel Maria) Doorman
Very little biographical information about this author could be confirmed from the sources reviewed. J. W. Langeler appears in library and public-domain book records as the co-author, with L. A. C. M. Doorman, of Nieuw-Guinee en de exploratie der "Meervlakte", a Dutch work published in 1918.
That book is an account of exploration in New Guinea and has remained accessible through public-domain and library catalogs, which is why Langeler is still encountered by modern readers. Because reliable personal details such as full name, dates, or a fuller life story were not clearly established in the available sources, it is best to remember Langeler mainly through this surviving contribution to Dutch exploration literature.