OCEAN SCIENCE AND ENGINEERING
p.49, Ben Oostdam's Autobiography

April 27, 1964: Cyril excited about our first diamond: 11:50 - 0.24 carats 1.5 m3 payfeed from single hole!

Rough seas, so we anchored in lee of Panther Head near u.w. pinnacle rising to depth of two fathoms!(twain)