when she sent an expedition to avenge the murder of a Mercian abbot and his companions; her men destroyed the royal crannog of Brycheiniog on Llangorse Lake and captured the queen and thirty-three of her companions. According to a version of the Anglo-Saxon Chronicle strongly sympathetic to Edward the Elder, after Æthelflæd's death "the kings among the Welsh, Hywel and Clydog and Idwal, and all the Welsh people sought to have [Edward] as their lord". Hywel Dda was king of Dyfed in south-west Wales, Clydog ap Cadell probably king of Powys in the north-east, and Idwal ab Anarawd king of Gwynedd in the north-west. Gwent in south-east Wales was already under West Saxon lordship but, in the view of Charles-Edwards, this passage shows that the other Welsh kingdoms were under Mercian lordship until Edward took direct power over Mercia. No coins were issued with the name of Æthelred or Æthelflæd on them, but in the 910s silver pennies were minted in west Mercian towns with unusual ornamental designs on the reverse and this may have reflected Æthelflæd's desire to distinguish specie issued under her control from that of her brother. After her death, west Mercian coin reverses were again the same as those on coins produced in Wessex. No charters of Edward survive for the period between 910 and his death in 924, whereas two survive in Æthelflæd's sole name, S 224, possibly dating to 914 and S 225, dated 9 September 915, issued at Weardbyrig, one of the burhs she built at an unidentified location. Death and aftermath Æthelflæd died at Tamworth on 12June 918 and her body was carried to Gloucester, where she was buried with her husband in their foundation, St Oswald's Minster. According to the Mercian Register, Æthelflæd was buried in the east porticus. A building suitable for a royal mausoleum has been found by archaeological investigation at the east end of the church and this may have been St Oswald's burial place. Placement next to the saint would have been a prestigious burial location for Æthelred and Æthelflæd. William of Malmesbury wrote that their burial places were found in the south porticus during building works in the early twelfth century. He may have been misinformed about the position but it is also possible that the tombs were moved from their prestigious position next to the saint, when the couple became less known over time or