What medium is "The Early Ploughman, or The Morning Spread Upon the Mountains"?

The Early Ploughman, or The Morning Spread Upon the Mountains is Etching; fifth state of nine.

Is "The Early Ploughman, or The Morning Spread Upon the Mountains" in the public domain?

Yes, The Early Ploughman, or The Morning Spread Upon the Mountains is in the public domain and available for free download under CC0 license.

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This artwork was created before 1861.

Samuel Palmer, before 1861