Pierre Boisteau is an eighteenth-century French writer (a French Humanist in reality) whose books contained illustrations of monsters in the series. In reality, he wrote a few books rather about the French language and translated many Latin texts or plays of William Shakespeare in French.("Better Angels")
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 he saw on the Mosaic Investigation wall in his flashforward is an illustration from a book by Boisteau. ("Better Angels")
The word "BOISTEAU" appears in white on Dyson Frost's wall. ("The Garden of Forking Paths")