In 1888 Robertson obtained leave of absence for the purpose of making another trip to the old country, and upon his term of office expiring in the same year he retired finally from Parliamentary work. For some years after the death of William Robertson, sen., the combined property was worked by the brothers in partnership, and the firm of Robertson Brothers became famous throughout Australia for the great annual sales of shorthorn cattle which were initiated. The herd had been commenced by Robertson, sen., at least a quarter of a century before, and he spared neither time nor money to procure some of the best strains of blood then extant. The stock had been kept perfectly pure, and in 1875 the brothers began a series of annual drafts from their herd, which were submitted at auction year by year and realised almost fabulous prices. On each occasion stock-breeders flocked to Colac from all the Australian colonies,
New Zealand, and Tasmania. At one sale the prices paid aggregated upwards of £30,000, and at another the total receipts were £25,800. On one occasion the firm purchased from the estate of the late Richard Morton thirty-seven prime shorthorns, known previously as the Mount Derrimut herd, for £27,000, the sum of £2,500 being paid for one of the bulls: Oxford Cherry Duke. The last sale of the regular series took place in 1884, and in 1885 the famous "F.F." herd was dispersed, owing to the dissolution of the partnership which had till then subsisted between Messrs. Robertson Brothers and the executors of the late John Robertson, the surviving brothers having decided to confine their attention almost exclusively to sheep-breeding. On 24 April 1863 William Robertson married Martha Mary, second daughter of J. R. Murphy, of Melbourne. Robertson's eldest son, William St. Leger, was educated at Oxford, and during his stay there had the same pleasant experience as his father of being one of the winning crew in the annual boat race against Cambridge. He afterwards settled at
Broome, Western Australia, as resident partner with the Messrs. Streeter, of London, in the pearl fishing industry and in squatting pursuits in the Kimberley district. Robertson died at Colac on 24 June 1892. ==References==