 The current chronology, basically laid down by Mark Blackburn in the mid-1980s, rests on the large Cimiez hoard from southern Gaul, which contained "sceattas" of several secondary types alongside local issues of named rulers that allowed the hoard to be dated c. 715/20.There remains much uncertainty about the organisation behind the "sceattas" and exactly what authorities lay behind minting.Some issues are so large that only major rulers could have been behind them, whilst others are so small that they could well have been the work of an individual moneyer working independently.