Battle of the Conwy In 877 they partitioned Mercia, taking the east for themselves and leaving the west to Ceolwulf. Gwynedd was also under attack from the Vikings, and in 877 King Rhodri Mawr was defeated and driven out. He returned the following year, but immediately came under attack from Mercia, which was still trying to maintain its hegemony in Wales. King Alfred's victory over the Vikings at the Battle of Edington in May 878 relieved the pressure on Mercia, and in the same year Mercia defeated and killed Rhodri Mawr. Ceolwulf died or was deposed in 879, and he was succeeded as Lord
The Daughter Of King Under-Waves bundle of rushes, and they were glad to see each other. She told him she had lost three gulps of blood; when he told her he had them, she told him she needed the cup of Righ Magh an Ioghnaidh, the King of Plain of Wonder, to drink from to recover. He set out and came to a rivulet he could not cross. A little russet man brought him over, and he reached the castle. There he shouted that he wanted either the cup or battle, and the king three times sent out forces against him, and Diarmaid killed them