 Moreover, Hickman was the main photographer present during an NAACP meeting on 22 September 1956, in which Thurgood Marshall and W. J. Durham, both African American justice lawyers, were speaking.A link can be made between much of Hickman's work in Dallas and a Texas colleague, Calvin Littlejohn, who photographed many similar events in the city of Fort Worth.Littlejohn and Hickman documented very similar events in their respective cities, as many of the notable individuals would tour both cities.