A fact from Portraits of Charles Darwin appeared on Wikipedia's Main Page in the Did you know column on 12 February 2009, and was viewed approximately 8,400 times (disclaimer) (check views). The text of the entry was as follows:
Did you know... that the numerous photographs of Charles Darwin—at least 53 (example pictured)—may have helped secure the singular connection between Darwin and the theory of evolution in popular thought?
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Maybe it,s just me, but the two Maull & Fox portraits look to me as clearly being the exact same picture in two different forms/qualities. Circeus (talk) 06:14, 7 February 2009 (UTC)[reply]
They are. I wasn't sure what to do, since one is more complete, but the other is cropped and high quality. Maybe another column for alternate versions and derivatives? A lot of these were used as the basis for other things (like engravings, cigarette cards, busts, etc.) that are also public domain.--ragesoss (talk) 07:40, 7 February 2009 (UTC)[reply]
Clearly these are just two different quality printing of the same picture (unlike, say, a painting or engraving of the same picture). As such, unless the exact details of the second can be located, I'd keep only the more complete one. But that's just me. Circeus (talk) 00:48, 8 February 2009 (UTC)[reply]