# lenna.png:

By Original full portrait: "Playmate of the Month". Playboy Magazine. November
1972, photographed by Dwight Hooker.This 512x512 electronic/mechanical scan of
a section of the full portrait: Alexander Sawchuk and two others[1] - The
USC-SIPI image database, Fair use,
https://en.wikipedia.org/w/index.php?curid=20658476

# valid.jpg

By No machine-readable author provided. Webber assumed (based on copyright
claims). [Public domain], via Wikimedia Commons
