Analysis of information sources in references of the Wikipedia article "Low-key photography" in English language version.
[...] black face like that and a black background and pull it of in direct sunlight – and that is a challenge.
In a typical Karsh photograph, the sitter's visage emerges from a black background so dense and velvety that it could be poured on a sundae.
A gentleman, whose real name was George Sharp, but who generally went by the appellation, amongst his musical friends, of G sharp, on entering the company, and looking rather dull, a common friend observed that Mr. G. Sharp, was rather on a low key, that evening.—"O," replied a lady, with a good deal of naivette, "every body knows that G sharp is A flat."
