Der Herkulesknabe erwürgt in seiner Wiege die zwei von Hera gesandten Schlangen 

Louis Testelin rendered *Der Herkulesknabe erwürgt in seiner Wiege die zwei von Hera gesandten Schlangen* in sanguine, or red chalk. The earthy pigment lends warmth to the mythological scene. Look closely at the figures; the sanguine brings depth and volume to the clouds and musculature of the figures, while the linear strokes define the composition. As a drawing, its nature is to be preparatory, perhaps as a study of color and composition. Chalk is inexpensive, readily available, and easily manipulated, making it ideal for quick sketches and detailed studies alike. Red chalk, particularly, became popular for its ability to mimic the tones of human flesh. Testelin no doubt relied on this quality to convey the drama of the narrative; the soft, sensual medium softens the edges of the unfolding horror. The drawing’s inherent value lies not only in its aesthetic qualities but also in its capacity to reveal the artist's process and intention. It reminds us that even the most polished artworks are rooted in the labor of creative exploration and refinement.