were guided by M.P. Durack to a point on Rosewood station near Argyle Downs close to the 129th meridian east longitude (129° east). They used the relatively new technology of the day, wireless radio time signals, and other methods to fix a position for the Northern Territory border with Western Australia. These early determinations led to the 1968 agreement for the formation of Surveyor Generals Corner. The WA border is not straight (see Western Australia border); at the 26th parallel south (26° south) there is an approximately "sideways" section of the WA/NT border, which runs east–west. Hyman Solomon Spigl Curlewis's successor as Government Astronomer was Hyman Solomon Spigl between 1940 and 1962. Spigl, who was from a surveying background, progressed rebuilding a post war ravaged Observatory by rejuvenating the time service, seismology services, completing the Astrographic Catalogues, became involved in the International Geophysical Year by installing a Markowitz Moon camera and restarted the publications for the Royal Astronomical Society. Additionally, through a National Science Foundation of America grant, he was in the process of refurbishing the Observatory's meridian transit circle to recommence meridian observations. While he never achieved this before his death, and it was never used again, the instrument sits in the foyer of the Perth Observatory now fully refurbished. In 1958 Spigl was awarded a Gledden Travelling Fellowship by the University of Western Australia; Spigl spent 12 months travelling in the US, UK and Europe. Spigl was actively searching for a new site for the Perth Observatory as a result of the decision for it to be relocated as an outcome of the implementation of the 1955 Stephenson-Hepburn Report. Spigl spent many years lecturing in surveying at the University of Western Australia and was involved in the Astronomical Society of Western Australia. John Bertrand Harris Upon the death of Spigl on 20 August 1962, John Bertrand Harris, who had been Spigl's assistant since 1957, became the fourth Government Astronomer of the Perth Observatory between 1962 until the end of 1974. Harris had to step in to the position of Government Astronomer at a time when the Perth Observatory was on the move to its new site in the Darling Range, Bickley, some east of its original position in the City of Perth. Clearing of the land in the State Forrest in Bickely commenced in February 1964, with excavations commencing in May 1964 and construction works on buildings continuing