Roberts was intrigued by Post-Impressionism and Cubism, an interest fuelled by his friendships at the Slade (in particular with Bomberg) as well as by his travels in France and Italy after leaving the Slade in 1913.
Robert se zajímal o post-impresionismus a kubismus, jeho zájem byl ovlivněn přátelstvím, která navázal ve škole Slade, zejména s Bombergem a také cestami do Francie a Itálie, které podnikl poté, co v roce 1913 školu opustil.