In his original Flash, Mark saw a much less distinct version of the picture. The clue has not been added to Mark's board and is only seen in his flashforward. In the future, it will appear near the bottom of the board and slightly to the right. Behind the hydra in the painting is a pyramid-shaped building. After finding out from Lloyd Simcoe that D. Gibbons is Dyson Frost and that Frost was supposedly killed on a boat named Le monstre de Boisteau, Mark Benford figures out that the hydra painting is an illustration from a book by Pierre Boisteau. ("Better Angels")