What medium is "Rapids Above Hadley's Falls (No. 4 of The Hudson River Portfolio)"?

Rapids Above Hadley's Falls (No. 4 of The Hudson River Portfolio) is Aquatint printed in color with hand-coloring; first state of two (Koke).

Is "Rapids Above Hadley's Falls (No. 4 of The Hudson River Portfolio)" in the public domain?

Yes, Rapids Above Hadley's Falls (No. 4 of The Hudson River Portfolio) is in the public domain and available for free download under CC0 license.

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This artwork was created 1822–23.

John Hill|William Guy Wall|Henry J. Megarey, 1822–23