Well, reading the info from your Journal, if I remember rightly, you've had the cutscene with Kan-E-Senna in Lewin's office, so what you need to do is go back there and speak to Bowlord Lewin to continue (he can be found in his office, the Seat of the First Bow, which is found at the back of the Wailing Barracks, the LNC Guild in Old Gridania - to enter you have to speak to the elezen Wood Wailer outside the door).

As the area he is in is a 'special' area, it explains why it probably wasn't showing on your map. Speaking to Lewin will tell you where to go after that.