The volume contains a printed list of books, letters and papers exhibited in the Cambridge Philosophical Library, by permission of the committee, on 20 June 1905, for those attending the Fourth International Congress of Ornithologists in Cambridge that summer. The volume also contains the signatures of some of those attending the congress (presumably those visiting the exhibition).
It also contains signatures from two further events: those attending a ‘Darwin Celebration’ in Cambridge, 22-24 June 1909, being ‘delegates and other guests invited by the University’; and those attending an International Congress in Mathematics in 1912.