Sir Sadok was a Cornish knight who was going with Sirs Tristram and Dinas to the tournament at Castle Dangerous. Sadok was one of Mark's men, and when Mark murdered Prince Boudwin, he sent Sadok to bring back Boudwin's escaping wife Anglides and infant son Alisander. Sadok caught up with Anglides within ten miles, but let her go on condition she raise her son to avenge his father's death (which she may have intended to do anyway). Sadok returned to Mark and told him he had faithfully drowned Boudwin's son.