This is the third chapter of an unpublished autobiography by art theorist and national treasure Donald Brook. Previous chapters were published in 2005 in Artlink Vol 25#3 and in 2006 in Vol 26#4. In The Realities of Power Brook recapitulates what happened in terms of teaching and policy at the Power Institute, University of Sydney, in the late sixties when he first arrived in Australia from the UK. His long and detailed account explores why, in his opinion, the early Power Institute had so little impact on Australian visual culture. The rest of Brooks autobiography waits in the wings.