Complex sentence: Hoards dating to the Viking occupation of London in 871/2 have been excavated at Croydon, Gravesend, and Waterloo Bridge; these finds hint at the cost involved in making peace with the Vikings.
Split into simpler sentences: Hoards dating to the Viking occupation of London in 871/2 have been excavated at Croydon, Gravesend, and Waterloo Bridge. These finds hint at the cost involved in making peace with the Vikings.