Groom

The brothers have returned to Brandon Abbas from university, when a valuable family heirloom, the 'Blue Water' sapphire, goes missing. Lady Brandon is reluctant to call the police and hesitates, to give an opportunity for the jewel to be returned; instead, Michael vanishes after leaving a note accepting responsibility for the theft.

The brothers are reunited after being sent to Oran with a draft of new recruits. Their Sergeant-Major, Lejaune, takes a disliking to the trio, and also to two American recruits, Hank and Buddy. Boldini overhears the brothers discussing the Blue Water, and – with his criminal contacts – offers to help them, only to be rebuffed.

The column marches across country to Fort Zinderneuf; once there, Lejaune has Hank, Buddy and Digby sent to a further post. Lejaune's harsh treatment, and promotion of Boldini to corporal, cause increasing resentment; when the fort's CO, Renouf, shoots himself, Lejaune has to take command.

John kills Lejaune in the struggle, and then flees the fort on the approach of the relief column. Digby finds Michael's body and, remembering a childhood promise, gives it a Viking funeral – on a pyre – before fleeing himself. He finds John and they set off on foot, but is killed; only John is able to reach England where he returns the Blue Water to Lady Brandon – as Michael had known, a copy made when she had been forced to sell the original.