Traditional fishing boat were used for war and trade. Some ancient vessels were propelled by either oars or sail, depending on the speed and direction of the wind (see trireme and bireme). The Chinese were using sails around 3000 BC, of a type that can still be seen on traditional fishing boats sailing off the coast of Vietnam in Ha Long Bay. A jangada is an elegant planked fishing boat used in northern Brazil. It has been claimed the jangada dates back to ancient Greek time. It uses a triangular (lateen) sail, which allows it to sail against the wind. A felucca is
Death on the Nile in a single carefully premeditated flash of movement." He concluded, "Though less than secondary, the descriptive work is adequate and hits, as it were, the Nile on the head." "The Scotsman" of 11 November 1937 said, "An Agatha Christie story, and especially one with Hercule Poirot applying his 'little grey cells,' is always an event. It is a matter of opinion whether this author has a superior in giving an unexpected twist to concluding chapters, but it is arguable that she has none. In "Death on the Nile", however, the solution of the mystery does not come with all that