Photograph of the composer Axle Agerby.
The photographer's name is not in the book. The signature "Jonals Co." means that the photographer very likely was Herman Bente (1881-1947) or one of his many associates.
This image comes from the music masters vol. 2, Ejnar Jacobsen and Vagn Kappel, published on Jul. Gjellerup publisher in 1947.