Note 64 — Chapter III · INDEPENDENT RULE, 1087-95
Reading edition
Davis, Regesta, no. 310, a charter of confirmation by Duke Robert for Bishop Odo of Bayeux, dated 1089, “secundo anno principatus Roberti Guillelmi regis filii ac Normanniae comitis, dum idem Robertus esset ad obsidionem Auci ea die qua idem castrum sibi redditum est.” This would necessarily be not later than September.