`` nagasaki is in hizen province , on the western side of kyushu-and hizen is on the ariake sea , like chikugo , so it will be much easier to get to there , '' junichiro added , and with a finger dipped in river water sketched him a very rough shape on the dry part of the dragon 's back , which shortly evaporated but left laurence with the comfort , not inconsiderable for a man who was used to knowing his precise latitude and longitude at nearly every moment , of having some approximation of his bearings .