until the newly federated Commonwealth of Australia took over all such services on 1 March 1901 and Todd became a federal public servant at the age of 74. He retired in December 1906, having been over 51 years in the service of the South Australian and Commonwealth governments. Death and legacy Todd died at his summer home in Semaphore, near Adelaide, on 29 January 1910, and was buried at North Road Cemetery, Adelaide, on 31 January. The Sir Charles Todd Building at the University of South Australia, Mawson Lakes Campus is named after him. The Astronomical Society of South Australia have also named the observatory that houses their 20-inch Jubilee Telescope, the Sir Charles Todd Observatory. Each year the Telecommunications Society of Australia invites a prominent member of the telecommunications industry to present the Charles Todd Oration and awards a medal to the industry high achiever best embodying the pioneer spirit. He has been inducted into the Hall of Fame of the Institute of Engineers Australia. The ephemeral Todd River and its tributary, the Charles River, in the Northern Territory were named after Todd, and a waterhole in the bed of the Todd River was named Alice Springs for his wife, Alice, and subsequently used for the telegraph station, and later the town. Family Todd married Alice Gillam Bell (7 August 1836 – 9 August 1898) on 5 April 1855. Their children were: Charlotte Elizabeth Todd (1856– ) married Henry Charles Squires ( – 12 December 1930) of Clement's Inn, London on 25 May 1887. They lived in Cambridge, England. Dr Charles Edward Todd (1858 – 23 May 1917) married Elsie Beatrice Backhouse (sister of Judge Backhouse of Sydney on 1 May 1889 (no children). Honorary Assistant Surgeon at Adelaide Hospital; practised also at the Private Hospital, Wakefield Street in Adelaide; President of the South Australian branch of the British Medical Association 1901–1902. Hedley Lawrence Todd (1860 – 4 August 1907) married Jessie Scott ( –1945) on 17 August 1892. Hedley was a member of the Adelaide Stock Exchange. (Alice) Maude Mary Todd (1865 – 4 February 1929) married Rev. Frederick G. Masters ( – ) on 1 May 1900. Masters was rector of All Souls' (Anglican) church, St Peter's, Adelaide, then Holy Trinity Church, Balaklava and later vicar of St Luke's, Bath, Somerset, and Dean of Sion College in 1937. Gwendoline Todd (1869 – 29 September 1929) married the