The polymath Young corresponded with Arago and Fresnel about scientific matters in general and the wave theory of light in particular. Arago visited Young in 1816 to tell him of experiments in polarisation he and Fresnel had conducted. Malus and Banks were among his scientific correspondents. Watt, Wilkinson and Young were members of a panel convened to select the design for a new London Bridge. Cavendish and Wollaston were among his friends.