but at the end of the table is introduced the cardinal fact of all these earliest materials concerning eriol and tol eressea : hengest and horsa , eriol 's sons by cwen in heligoland , and heorrenda , his son by naimi in tol eressea , are bracketed together , and beneath their names is written : conquered feg ( 'seo unwemmede feg ' ) now called englaland and there dwell the angolcynn or engle .