"The Astronomer Royal's official Room" - Royal Observatory Greenwich ca 1900
"A.R.'s desk in the background. Left hand desk - Mr P H Cowell Ch. Asst. Rt-H - Mr F W Dyson Ch. Asst."
The Astronomer Royal traditionally had tweo Chief Assistants and teh two referred to here are Philip Herbert Cowell (second chief assitant from 1896) and Frank Watson Dyson chief assistant from 1894 to 1905 (and later reteurning as Astronomer Royal).
From a lovely small album containing 24 'behind-the-scenes' images of the Royal Observatory, Greenwich, ca 1900. See the full set - www.flickr.com/photos/whatsthatpicture/sets/7215763131028...