The Dictionary of Sydney was archived in 2021.
Rümker, Christian Karl Ludwig
German mathematician and sailor who interest in astronomy led him to work at Governor Brisbane's private observatory at Parramatta from 1821-1823. He was appointed the first government astronomer in 1827 and went to London in 1829 for astronomical instruments. He was dismissed from the government's service after a quarrel with the head of the Royal Astronomical Society, and did not return to Sydney. His name was often recorded as Charles or Carl Runker or Rumcker.