In case you missed it there's a fascinating article as part of the Guardian's Science The H Word series by Mirjam Brusius. She explores new archive evidence that tells a different story about the history of photographs and questions the idea of invention and 'firsts' in photography.
Well worth a read.
Comments
What about Nicéphore Niépce? Bitumen of Judea may not have provided a very clear image, but what was produced was undoubtedly a photograph.
See this new and excellent volume by Tanya Sheehan and Andrés Mario Zervigón for more critical work on photography's origins:
http://britishphotohistory.ning.com/profiles/blogs/routledge-publis...