The Herefordshire SMR says on the stone that “there are traditions ‘of a general said to be buried there’ and of a farmer digging round it & unsuccessfully applying the strength of 12 horses to root it up.”
The stone had fallen by 1982 (when its total length was seen to be 9 foot) and it was reerected in 1989.
smr.herefordshire.gov.uk/hsmr/db.php?smr_no=1101 (It’s not clear to me from which of the sources given the folklore originates).