Nicholson attended a number of conferences and meetings including an International Council for Bird Preservation meeting (mid-Jun), the International Ornithological Congress, Cornell University, Ithaca (NY) (3rd week of Jun), and the First World Conference on National Parks, Seattle (end of Jun). He also spent a few days in Colorado (chiefly Boulder) to view a biological education project and research carried out by the US Forest Service.

Correspondence with various organisations and individuals regarding arrangements; manuscript notes on the First World Conference on National Parks and a further manuscript notes possibly related to these.