Silhouette artist Otto Böhler’s (1847-1913) book Dr. Otto Böhler’s Schattenbilder is a treasure trove of adorable drawings of musicians:
Below: Sauer at the piano, Nikisch at the podium. Both in need of hankies.
Another silhouette by Böhler shows Grieg and his distinctly Einsteinian hairstyle:
And this rather beautiful depiction of Mahler conducting:
Brahms through Böhler’s eyes looks so sweet and lovable, like a character from a Beatrix Potter story: