<Tr> <Th> 12 </Th> <Td> Robert Menzies (1894--1978) </Td> <Td> </Td> <Td> United Australia (Coalition) </Td> <Td> 26 April 1939 </Td> <Td> 28 August 1941 </Td> <Td> Kooyong, Vic, 1934--1966 (resigned) </Td> <Td>--</Td> <Td> 1st Menzies </Td> <Td> </Td> </Tr> <Tr> <Td> 2nd Menzies </Td> </Tr> <Tr> <Td> 1940 </Td> <Td> 3rd Menzies </Td> </Tr> <Tr> <Th> 13 </Th> <Td> Arthur Fadden (1894--1973) </Td> <Td> </Td> <Td> Country (Coalition) </Td> <Td> 28 August 1941 </Td> <Td> 7 October 1941 </Td> <Td> Darling Downs, Qld 1936--1949 McPherson, Qld 1949--1958 (retired) </Td> <Td>--</Td> <Td> Fadden </Td> <Td> </Td> </Tr>

Who was the prime minister of australia in 1851