Peter Clarkson and Ellen Dowie visited the School of Mathematics and Physics, University of Tasmania, Hobart, Australia for two weeks in October and November 2016, where Peter gave a seminar. Peter also gave seminars at: the Research School of Physics and Engineering, Australian National University, Canberra; School of Mathematics and Physics, University of Tasmania, Hobart; School of Mathematical Sciences, University of Sydney, Australia; and Department of Mathematics and Applied Statistics, University of Wollongong.