 The ship rounded Cape Horn and continued westward across the Pacific to arrive at Matavai Bay, Tahiti on 13 April 1769, where the observations were to be made.The transit was scheduled to occur on 3 June, and in the meantime he commissioned the building of a small fort and observatory at what is now known as Point Venus.The astronomer appointed to the task was Charles Green, assistant to the recently appointed Astronomer Royal, Nevil Maskelyne.