Grace Mugabe might have avoided going to court for allegedly assaulting a young South African model. But Zimbabwe’s first lady could still face South African justice even though she was granted diplomatic immunity. Gerhard Kemp explains what diplomatic immunity does - and doesn’t - cover.

Rhino breeder John Hume has been granted permission by a South African court to host a 3-day auction of his stockpiled rhino horn. Hume argues that the sale will help curb poaching because the market will be flooded with horn cut from a cultivated herd. But Ross Harvey argues that there’s no proof that the outcome will be positive.

Some people think pipe organs are suitable only for playing hymns or “old” music, boring stuff devoid of much artistic merit. But, as Theodore van Wyk (himself an organist) writes, the instrument’s repertoire spans most genres, from capricious preludes and fugues to jazz-inspired pieces, and it has even ventured into alternative rock.