 This introduced the heavier, finer "cross-and-lozenge" type after a number of very rare and interesting experimental issues were struck in the years around the reform.At London, which lay within the Mercian kingdom, Alfred was initially recognised as king of Mercia as well as Wessex after the deposition of Burgred in 873/4, and was even called REX ANG("lorum") on one of two known examples of the "two emperors" portrait penny type.The other specimen of this fascinating type is in the name of Ceolwulf II, the new Mercian king installed by the Vikings.