One of Prophet's finest surviving works dates to this period: "Negro Head", a larger than life size wooden sculpture, which a niece of Frank Ford identified as her Uncle Frank. Prophet exhibited at the Salon d'Automne and the Societe des Artistes Francais in Paris. W.E.B. Du Bois and Countee Cullen helped submit her work to exhibitions in the United States as well. Prophet won the Harmon Prize for Best Sculpture in 1929. Her wooden sculpture "Congolaise" imitates noble conflict and "speaks to the ancestral legacy articulated by Locke and Du Bois" during this time.