In his introduction to the catalogue for the 1953 exhibition at the Institute of Contemporary Arts, London, Will Grohmann noted the variety of Klee drawings in Curt Valentin's large collection and how it reflected the diversity of the artist's output.

Klee could certainly not master the exuberance of his
inventiveness in paintings alone; much had to remain in
sketch form. Some of these sketches are consummate in
themselves and need no further development, while others
are preliminaries which Klee would re-work, often only
after years had passed. Still others were done only after
the picture had been completed and represent an additional
mastery as well as an enrichment of the catalogue of his
work. In his drawings, so to speak, Klee provided an
inventory of all his creative effort.

A photo-certificate from Josef Helfenstein and Stefan Frey of the Paul Klee-Stiftung accompanies this drawing.