The middle of the 1930s saw Sassu involved in the organization of anti-Fascist political propaganda, an activity that led to his arrest and conviction in 1937. The experience of prison, which lasted about a year and a half, while keeping him from working on large paintings on canvas, did permit him to elaborate a corpus of about 400 drawings. In these we find not only the elements that would reappear in later compositions, but also subjects that are finished in themselves. This is the case of the watercolor proposed here, portraying his three cell-mates; they appear to be closed in an ideal semi-circle, as though to indicate the solidarity uniting them.