Rubens’ study of Cupid is a supplementary drawing made to guide the work of his assistants in the production of Cupid Supplicating Jupiter’s Consent to his Marriage with Psyche. Rubens could easily create such images from memory, and this work lacks the immediacy of many of his life studies. The drawing’s function is to provide direction, something like a set of instructions. Close comparison of the drawn and painted forms shows clearly how the limited tonal values in the drawing were to be read by an assistant charged with transfer of the form into paint. The result is a simplified application of Rubens’ practice in flesh painting.