TOSTIG, SON OF GODWIN:--Tostig is made Earl of
Northumberland--His cruelty--The Northumbrians force him to
flee--Harold is sent against the insurgents--Tostig is
deposed--His anger is turned against Harold--The massacre of
Hereford--Tostig repairs to Flanders--Obtains aid from William
of Normandy--Tostig's unfavourable reception by Sweyn, King of
Denmark