During Whistler 's absence , Hiffernan travelled to Paris .
During Whistler 's absence , Hiffernan posed for Courbet in The Sleepers , or Le Sommeil , which depicts two naked women in bed asleep .
During Whistler 's absence , Hiffernan travelled to Paris and posed for Courbet in The Sleepers , or Le Sommeil , which depicts two naked women in bed asleep .