Matholwch, fearing war, tries to reconcile with Brân by building a house big enough for him to fit into in order to do him honour. Matholwch agrees to give the kingdom to Gwern, his son by Branwen, to pacify Brân. The Irish lords do not like the idea, and many hide themselves in flour bags tied to the pillars of the huge, newly built house to attack the Welsh.
