The dramatic effects of sunlight, clouds, and water in Gustave Le Gray’s seascapes stunned his contemporaries and immediately brought him international recognition. At a time when photographic chemistry was not equally sensitive to all colors of the spectrum, most photographers found it impossible to achieve proper exposure of both landscape and sky in a single picture. Here, Le Gray solved this problem by printing two negatives on a single sheet of paper—one exposed for the sea, the other for the sky, perhaps made on separate occasions or even at different locations. Not only technical tours-de-force, such pictures were unprecedented in their poetic effect.