 Later, FitzRoy had to remain silent when Captain Paget visited them and recounted "facts about slavery so revolting" that refuted his claim.Surveying of sandbanks around the harbour was completed on 18 March, and the ship made its way down the coast to survey the extent and depths of the Abrolhos reefs, completing and correcting Roussin's survey.On 4 April they entered the harbour of Rio de Janeiro, to make observations of longitude from Villegagnon Island.