The image on the right was derived from the original illustrations in Bill Mollison's Permaculture Designers Manual.

https://files.sfba.social/media_attachments/files/111/139/354/902/463/685/original/abd7f9986fc9da5a.png

https://files.sfba.social/media_attachments/files/111/139/356/786/103/337/original/e8ad0adf26c519d4.png