William Angus Knight (1836–1916) was a British writer, born at Mordington, Scotland, and educated at the University of Edinburgh. From 1876 to 1902 he was professor of moral philosophy in the University of St. Andrews. In the field of philosophy his work, editorial and other, includes his collection of Philosophical Classics for English Readers (15 volumes, 1880–90), some of which he wrote. Although he wrote numerous publications, he is probably best known for his works on Wordsworth. His edition of Wordsworth's Works and Life (1881–89) is contained in 11 volumes. He presented to the trustees of Dove Cottage, Grasmere, the poet's former home, all the editions of Wordsworth's poems which he possessed. He also corresponded with Robert Browning about Elizabeth Barrett Browning, and on his retirement in 1905 he came to Florence's Swiss-owned so-called English Cemetery to plant the red rose at her tomb, which still flourishes, to honour women's learning, though the enamelled plaque celebrating that act has since been stolen. His portrait was presented to St Andrews University by the Ladies Literate in Arts whose admission he encouraged.