The Nuttall Encyclopedia
A river of South Africa, which rises in the Drakenberg Mountains, separates the Free State from the Transvaal, and after a course of 500 m. in a SW. direction joins the Nu Gariep to form the Orange River.
Wood, James, ed. Entry for 'Vaal'. The Nuttall Encyclopedia. https://www.studylight.org/encyclopedias/eng/nut/v/vaal.html. Frederick Warne & Co Ltd. London. 1900.