At Lagos, where the royal travellers were welcomed on to African soil, the Oba, the hereditary ruler, had ordered his medicine-man to make powerful ju-ju for a short shower to clear the air and lo, rain fell in the dry season for thirty-five minutes.Reference: Price Philip, by H.M. Queen Alexandra of Yugoslavia, published by Hodder & Stoughton, 1960. (The author was a cousin of Prince Philip.)
Some more of Prince Philip's early life and adventures can be found here.