Dates are known only for the Alaskan stage of this tour: 13-20 Aug 1966.

Brief correspondence regarding arrangements for the visit to Alaska; rough manuscript notes headed as above. There are references to some, but not all, of the places mentioned above. Included are a few further manuscript notes relating to Alaska, found with the 3pp described.

A report on Nicholson's 1971 visit to Alaska, stating that it was made on behalf of the International Biological Programme.