The Inklings were a group of authors in Oxford who met twice weekly in either the Eagle and Child or C.S. Lewis's room in Magdalen College. Formed at the beginning of the 1930s the Inklings were most active between 1939 and 1945. By 1949 the society had disappeared.
The Inklings were C.S. Lewis, Charles Williams and J.R.R. Tolkien. Others may also wish to include George MacDonald, G.K. Chesterton, Owen Barfield, Warren "Warnie" Lewis, Helen Joy Davidman Gresham, and Dorothy L. Sayers.
See also Google's listing of Inkling WWW pages.