G. Kielder

Very little biographical information about this author appears to be publicly documented in the sources I could confirm. Project Gutenberg lists G. Kielder as the author of Meesterstukken van Rembrandt Harmensz. Van Rijn: Leesboek voor het Lager en Voortgezet Onderwijs, a Dutch-language educational work.

That book is described as an early-20th-century reading text for lower and secondary education, centered on the art of Rembrandt. It presents selected works by the painter with explanation and reflection, aiming to build students' appreciation of art in an accessible way.

Because reliable biographical details such as full name, dates, nationality, or a fuller bibliography were not clearly confirmed, it is safest to remember G. Kielder mainly through this surviving Rembrandt volume and its calm, instructive approach to teaching art.