Henry Darcy: English translation of French biographical notes of his time with Ponts et Chaussées. Translation by Glenn Brown.
Henry Darcy: Short biography from the European Geophysical Society.
Henry Darcy and His Law: Contributions to understanding flow in porous media. Includes biography, discussions of basic concepts and the Darcy-Weisbach equation, and a lab procedure for falling-head permeability tests.
Wikipedia: Henry Darcy: Biography, portrait, and related links.