The tour included attendance at the International Ornithological Congress, Vienna, in August, where Nicholson delivered a presentation on 'Birds of the Western Palearctic'. Itineraries and typescript account of the tour; rough manuscript notes for the Congress presentation, manuscript drafts and typescript of the text; copy of letter by Nicholson to C.M. Perrins regarding the Congress. Also, includes manuscript notes on a Vienna to Budapest trip.