Photohistory is a complex blending of biographical, technical and thematic information. Photographs and archival research materials are scattered between thousands of collections with different perspectives and cataloging standards. The traditional model of monographs and articles based on exhibitions is now being questioned by Internet based resources that bring together information from thousands of sources to create repositories of knowledge (i.e. Daguerreobase) or broader frameworks to examine the whole of photohistory (Luminous-Lint). In this talk we’ll examine the progress of Luminous-Lint so far and the opportunities for collaborative research based on images from over 3,250 distinct collections.