Who created "Sleep: sketch for the painting, now in the museum at Lille"?

Sleep: sketch for the painting, now in the museum at Lille was created by Pierre Puvis de Chavannes in 1840–98.

What medium is "Sleep: sketch for the painting, now in the museum at Lille"?

Sleep: sketch for the painting, now in the museum at Lille is Pen and brown ink on tracing paper.

Yes, Sleep: sketch for the painting, now in the museum at Lille is in the public domain and available for free download under CC0 license.

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This artwork was created 1840–98.

Pierre Puvis de Chavannes, 1840–98