Gulielma "Guli" Hack ARCM (17 October 1867 – 2 August 1951) was a South Australian pianist, singer and teacher at the Elder Conservatorium, Adelaide.
[4] She held a concert at the Town Hall on 17 June 1891[5] and in July joined the staff of I. G. Reimann and Cecil Sharp's Adelaide College of Music[6] as the only woman singing teacher, and when in 1898 the college was merged into the Elder Conservatorium she was appointed to a similar position.
[7] Hack retired from the Conservatorium in October 1909, on the eve of her marriage, and was given several valuable mementoes by staff and past students.
As "The Misses Hack" Guli and Ethel lived at 58 South Terrace, Adelaide, teaching languages and music at their own school on Miller Street, North Unley, initially to small children.
[11] On 5 March 1910[12] Hack married William Ashley Magarey (30 January 1868 – 18 October 1929), in 1901 one of her students at the Conservatorium.