Concerning the retirement of astronomer Carl Rumker from the Parramatta Observatory, and seeking the approbation of the Board of Longitude in the hope of reinstating him.

Providing an extract of his last observations at the observatory at Parramatta and requesting government confirmation of the grant of 1000 acres of land at Stone Quarry Creek (which he had received from the governor).

On assisting [William] Richardson in reducing the observations taken at Parramatta Observatory under Sir Thomas Brisbane.

Informing him that the Admiralty had authorised the reduction of the observations taken at Parramatta Observatory under Sir Thomas Brisbane.

Concerning the reduction of the observations taken at Parramatta Observatory under Sir Thomas Brisbane.

Concerning his reduction of the observations taken at Parramatta Observatory under Sir Thomas Brisbane.

Includes correspondence relating to the reduction of observations (from astronomer Carl Rumker).

The collection consists chiefly of handwritten stellar reductions and other calculations, often relating to the establishment of longitudes. There is also a small collection of correspondence, some notebooks, and some draft papers. Documents relating to the transfer of the collection to Greenwich are in RGO 69/12 (see also the letter at RGO 69/1/19).

Includes correspondence relating to the reduction of observations (from astronomer Carl Rumker).