Found as Image:Heiroglyphs sample British Museum.jpg on Wikimedia Commons. Now deleted. Source of the non-photoshopped version and its licence are unknown. (If it is treated as a two-dimensional work of art, then it is old enough for a licence tag of {{PD-Art}}!)

Derived from this image on flickr by nrares. Some rights reserved

Part of the sarcophagus of Ankhnesneferibre in the British Museum.
 
Someone apparently working in the Ford Motor Company offices in Dearborn near Chicago and obviously with time on their hands uploaded the image on the left to Wikipedia. A very sharp-eyed person noted: "second column from the left, five down. Is that a real animal or a photo-shopped monster?" After a bit of searching I found the image on the right with a curious space where the monster has been inserted.