Working 40s to 1950s
Thanks to Klaus-Josef Rossfeldt for the following comments.---------------------Osmond was the chief designer of Hooper & Con (Coachbuilders), London. He saved an enormous amount of material when the coachbuilder closed down in 1959; among that were a considerable number of sketchesd, drawings, paintings by Osmond Rivers. He later lived in Denmark (his wife Inga was Danish) and decided to sell the vast majority of that material to a US collector by the name of Arthur Ripley. In his last will left all that (and much more) to the Museum of Western culture, Denver, Colarado.