Juvat ire jugis qua nulla priorum Castaliam molli devertitur orbita clivo

The lines are from Virgil, and freely translated read as follows Joyous it is to cross mountain ridges where there are no wheels ruts of earlier comers, and follow the gentle slope to Castalia. Niepce-Daguerre and Talbot had indeed walked along roads where no wheels before had gone, using entirely different methods. To Talbot belongs the distinction of being the first person to publish a workable photographic system which could be adopted worldwide. One of Talbot's early photographs is...