These visits were made by Nicholson and other members of the CT [Conservation of Terrestrial Communities] Sectional Committee of the IBP, following a CT Sectional Committee meeting in Rio de Janeiro. Nicholson attended meetings in the principal cities of Brazil, Argentina, Chile, Peru and Columbia; discussions were wide-ranging and included the proposed IUCN special programme for South America. Excursions to some National Parks were included.

Nicholson's South American trips were preceded by stays in Washington DC, Antigua and Trinidad and Tobago, mid Jun-early Jul.

Brief manuscript notes regarding Washington itineraries; manuscript bird lists for Antigua, Tobago and a few other bird notes relating to the Caribbean; manuscript list of engagements for the South American visits; manuscript itinerary for Nicholson's travels from early Jun to late Jul; brief correspondence (Jun) regarding arrangements in Washington and other personal business.