 Other historians, such as J. Brownbill, Barbara Yorke, Frank Stenton and Cyril Hart, have generally agreed that the Tribal Hidage originated from Mercia at around this time, although they have different theories for the identity of the Mercian overlord under whom the list was compiled.Wendy Davies and Hayo Vierck have placed the document's origin more precisely at 670-690.There is near universal agreement that the text originates from Mercia, partly because the kings of Mercia are known to have held extensive power over other Anglo-Saxon territories from the late 7th to the early 9th centuries, but also because the list, headed by Mercia, is almost exclusively of peoples who lived south of the river Humber.