Scottish painter and arts activist
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The rough surface, and unequal texture throughout of the paper is the main cause of the Calotype failing in details, before the process of Daguerreotypy – and this is the very life of it. They look like the imperfect work of a man – and not the much diminished perfect work of God.
[1848] Cited in "The History of Photography" by Beaumont Newhall, The Museum of Modern Art, New York 1964, p. 37.