Batman then sent a party up the Yarra by boat. On 8 June he wrote in his journal: "So the boat went up the large river... and... I am glad to state about six miles up found the River all good water and very deep. "This will be the place for a village"." This last sentence later became famous as the "founding charter" of Melbourne, but it is not at all clear whether Batman was referring to the Yarra or its tributary the Maribyrnong River. The map Batman later produced does not correspond well with the actual geography of the area.