Note 1142 — Chapter IX · THE REIGN OF EADWARD FROM THE RETURN OF GODWINE TO THE DEATH OF EADWARD THE ÆTHELING.[921] 1052–1057. (continued 2)
Reading edition
Simeon of Durham (Gest. Regg. in anno) speaks of Malcolm being Tostig’s “conjuratus frater” in 1061. The engagement must therefore have been entered into before that year and after 1055. Tostig would not become Malcolm’s sworn brother till he found himself his neighbour.