George Findlay MacRobert (sometimes McRobert, McRoberts), civil servant, was the son of John MacRobert and his wife Ann Barker MacRobert, born Findlay. He entered the civil service of the Cape Colony in May 1884. Not long thereafter he was living at Wagenaarskraal, a small farming community in the Karoo about halfway between Beaufort West and Victoria West. The farm, which was acquired by the MacRobert family in 1870, was an important station on the stage coach route between Wellington and Kimberley. George was appointed as postmaster there in August 1890, a position he held until his death early in 1907. On 27 May 1890 he married Mabel Louisa Nugent.
MacRobert regularly reported rainfall data from Wagenaarskraal to the Meteorological Commission of the Cape of Good Hope from 1887. (In 1885 and 1886 the observer there was listed as T. McRobert). From the beginning of 1889 he was in charge of a meteorological station at Wagenaarskraal and supplied the Commission with the complete set of meteorological observations made by its observers at the time. A summary of his observations was published in the Commission's annual reports from that year onward. When meteorological stations were first classified as first order, second order or climatological (third order) stations in 1897 Wagenaarskraal was listed as a climatological station. However, it was upgraded to a second order station from the beginning of 1898, and its position given as 31 degrees 48 minutes South, 22 degrees 48 minutes East. McRobert continued his observations until the end of 1905, after which the station was closed down.