Via Dave Lull: A report from The Guardian on a new exhibition in England, devoted to the Viking Great Army (also known as the Great Heathen Army) which wintered over in England in 872:
A major exhibition at the Yorkshire Museum, staged in partnership with the British Museum, draws on new research by the universities of York and Sheffield. According to Professor Dawn Hadley, one of the co-directors of the universities’ project at the site of a Viking winter camp, archeologists and historians had thought that the invading Viking armies numbered in the low hundreds. But archeological work at the camp on the river Trent at Torksey, Lincolnshire, suggested otherwise.
Historians have been inclined to consider contemporary chronicles, which numbered the Great Army in the thousands, as exaggerations, because… because historians always think medieval chroniclers were very gullible and stupid, and exaggerated everything. In general, my impression is that trusting the most contemporary sources is generally a prudent approach.