Contents of an unmarked envelope: 2pp manuscript notes on 'Purple Gallinules' dated 29 April 1976; 2pp typescript notes headed 'Objective of the [Master Plan] Project', 1977; set of manuscript notes headed 'Donana follow-up' on first page, 1981; 4pp typescript draft titled 'The Rescue of Donana', undated (after 1978); various undated manuscript notes and drafts.