An old friend, and member of the original team, has sent me a link to a photo-book about the 1972 expedition that he has put together as a project during lockdown. He's happy to share, and methinks its part of caving history that it would be easy to forget.

https://ethiopian-caving.org.uk/registry/Exploring%20the%20Caves%20of%20Ethiopia.pdf

Thanks for sharing. A quick skim now and I'll definitely be giving that some reading time later.

*** Warning****

Do be aware there is a section on the history of the Congo that is rather gruesome and extremely sad.