The "Rötel" houses at Wipkingen
First semester plan drawing. First work as an ETH student under Prof. Dr. Fridolin Becker. Pencil, without scale. Oct. 27, 1914. 36 x 46 cm.
(Imhof, Eduard B 1)

Exercise in topographical drawing.
Glacial landscape. Without scale. June 1917. 24 x 31 cm.
(Imhof, Eduard B 3)

Piz Linard 1:50 000
School exercise in topographical drawing at the ETH under F. Becker. Pen-and-ink drawing. 1918. 6 x 6 cm.
(Imhof, Eduard B 8.1)

Relief map of the Rheinwaldhorn group 1:50 000
Watercolor and ink. 1916.
Free drawing of the student. Copy from Topographic Atlas of Switzerland (Siegfried Map), revised in the glacial areas. Drawn in connection with work on the SAC-Club Guide "Bündner Oberland". 26 x 41 cm.
(Imhof, Eduard C 1)

Glärnisch 1:50 000
Copy from Topographic Atlas of Switzerland (Siegfried Map).
First attempt using green contour lines. Watercolor with pen and ink. 1918. 24 x 34 cm.
(Imhof, Eduard C 2)