<Ul> <Li> Prof. Willem Jacobus Viljoen, 1918--1922 </Li> <Li> Sir . John Ernest Adamson, 1922--1926 </Li> <Li> The Rev. John Daniel Kestell, 1926--1928 </Li> <Li> Hugh Bryan, 1928--1930 </Li> <Li> Dr. Nicolaas Marais Hoogenhout, 1930--1932 </Li> <Li> Dr. Samuel Henri Pellissier, 1932--1934 </Li> <Li> Prof. Marthinus Christoffel Botha, 1934 - 1936 </Li> <Li> François Daniël Hugo, 1936--1938 </Li> <Li> Senator François Stephanus Malan, 1938--1940 </Li> <Li> Prof. Ferdinand Postma, 1940--1944 </Li> <Li> Adv . Alfred Adrian Roberts, 1944--1946 </Li> <Li> Dr. Herman Heinrich Gerhard Kreft, 1946--1948 </Li> <Li> Dr. Albertus Johannes Roux van Rhijn, 1948--1952 </Li> <Li> Prof. Stephanus Petrus Erasmus Boshoff, 1952--1955 </Li> </Ul> <Li> Prof. Willem Jacobus Viljoen, 1918--1922 </Li> <Li> Sir . John Ernest Adamson, 1922--1926 </Li> <Li> The Rev. John Daniel Kestell, 1926--1928 </Li>

What is written on the gate of university of south africa