Analysis of information sources in references of the Wikipedia article "Edwin, Earl of Mercia" in English language version.
The date of the grant is uncertain, and no charter remains to bear witness to it. The most likely date in that case would seem to be 1069, when Edwin was still living ... If the evidence of the so-called charter is inaccurate on this point as on others the grant may have been delayed until after the death of Edwin in 1071.
