Alexander Leicester McAulay (1863 - 1931) was an explorer of Clifford biquaternion theory and was the first professor of mathematics and physics at the University of Tasmania, Hobart, Tasmania. Alexander was born 9 December 1863 and attended Caius College, Cambridge, taking his degree in 1886.[1] He studied quaternions intensively at Cambridge. Departing for Australia, he lectured at Ormond College, University of Melbourne from 1893 to 1895. He was an advocate of quaternion calculus for modeling physical relations. Peter Guthrie Tait praised MacAulay's book Utility of Quaternions in Physics in these terms: He took up the position in Tasmania from 1896 until 1929. In 1898 he published through Cambridge his Octonions: a Development of Clifford's Biquaternions. Alexander MacAulay died 6 July 1931 As recently as 2002 the lives of Alexander and his son, who also taught physics in Hobart, were celebrated at the university (see external link). His brother Francis Sowerby Macaulay, who stayed in England, also contributed to ring theory.