Dorothea remained at the Sussex home and completed photography of the 52 areas, after which she went to stay with her mother and sister, Anna, at Chateau Rosa Bonheur, taking along the entire set of photographic plates. She returned to Paris Observatory and spent 25 years processing the plates and Isaac's notes, periodically publishing papers on the results. In 1929 she published a comprehensive catalogue of the survey "The Isaac Roberts Atlas of 52 Regions, a Guide to William Herschel's Fields of Nebulosity". She was awarded the Hèléne-Paul Helbronner prize in 1932 from the French Academy of Sciences for this publication.