Typescript draft with manuscript revisions (with amended earlier title 'Conservation and a New Renaissance'); offprint of the printed lecture; statement of payment for lecture; brief later correspondence regarding publication (1987-1989).

Included is a typescript inscribed with the following manuscript note, added by Nicholson at a later date: 'This text, apparently written in spring 1964, is related to my Californian lecture at Berkeley in March & to my Land Use & Ecology opening for Shell's Catalyst No.12 for spring 1964. Content a mystery'.