An Excellent Mystery is a mystery novel by Ellis Peters, the third of four set in the year 1141, when so much occurred in the period known as the Anarchy. It is the 11th in the Cadfael Chronicles, published in 1985.

The siege of Winchester sends monks streaming across England seeking safe haven. Two arrive at Shrewsbury Abbey. A young man seeks out the older of the two monks, wanting his approval to marry a young woman once meant for another, and she cannot be found. His quest begins.

An Excellent Mystery

Plot introduction

News comes slowly to the Abbey of Saint Peter and Saint Paul from the battles in the south between the imprisoned King Stephen and the Empress Maud besieged in Winchester. Empress Maud wants to regain the support of Henry, Bishop of Winchester, but the canny bishop will not side with her again after the failure of his legatine council. Rather he is building up his own stores at Wolvesey Castle in Winchester in case he is besieged, and rebuilding his alliance with Queen Matilda, now leading King Stephen's armies. In Winchester, battle begins, with the Bishop's forces shooting fire arrows. The Abbey of Hyde-Mead in Winchester is laid waste, dispersing the surviving monks.

An Excellent Mystery

Plot summary

In this hot, dry August 1141, Cadfael brings Brother Oswin to his term at the leper house at Saint Giles. Two monks arrive at Shrewsbury Abbey, Brother Humilis and the mute, young Brother Fidelis as refugees from Abbey of Hyde-Mead. Humilis came so far because he was born nearby. Cadfael recognizes Humilis as local man Godfrid Marescot, who joined the Crusades years earlier, gaining a reputation for valour. Hugh Beringar sees that the man is ill and not long for this world. Cadfael finds Humilis collapsed over his writing desk. Cadfael sees the severity of the old wound, which left him unable to father children.

An Excellent Mystery

Brother Urien makes a sexual advance towards young Rhun, but is rejected. Rhun is thus aware of the troubled Brother Urien. Two days later, Rhun begins formally as a novice with a tonsure, a Brother. A week or so later, Brother Urien makes an advance towards Brother Fidelis. Fidelis rejects him.

Nicholas Harnage arrives on leave from the Queen's army, to visit his leader in the Crusades. He wants to propose marriage to Julian Cruce. She was once betrothed to Humilis/Godfrid, but freed by him upon his return as a wounded man. Nicholas met her once, when he delivered this news three years earlier. Humilis consents, so Nicholas begins his quest for the lady.

Nicholas's quest brings him first to her family home; then to the convent at Wherwell, which she planned to join after Godfrid ended the betrothal; back to the family home to learn of the men who escorted her; to Winchester, with the Bishop's blessing, to seek the goods she carried as a gift to the convent that never heard word of her; each time returning to Shrewsbury Abbey with his news. He fears for her life when Wherwell Abbey is burned, and again when the jeweller who purchased her personal jewelry from the servant says the servant reported the lady as dead. On that news, her brother Reginald agrees to aid Nicholas. Hugh agrees to seek the missing escort Adam Heriet, a man-at-arms since the overlord called for more men from Reginald. In his travels, Nicholas witnesses the rout of Winchester. The Empress broke out of the siege, marching out at dawn along the Stockbridge road, now pursued by the Queen's army, which takes Robert of Gloucester at Stockbridge. He is held in Rochester. In the rout, the Empress escapes with her life.

Hugh finds Heriet at his sister's home. Heriet let Julian travel the last mile on her own at her request. He has no knowledge of her in the three years since. Hugh returns to Shrewsbury with Heriet. Heriet recalls Julian's happy expectation of her marriage to Godfrid, in her youth. Brother Humilis is in the infirmary where Cadfael and Brother Fidelis tend him. Hugh tells Humilis what he has learned and Heriet recounts his story. Heriet denies robbing and killing Julian, and agrees to stay in a castle cell.

Alone with Cadfael and Hugh, Brother Humilis asks about the valuables that disappeared with Julian. Hugh describes them. Brother Urien overhears and thinks one item is worn by Brother Fidelis, giving Urien reason to approach again. Angered by rejection, Urien pulls the chain to see what hangs on it. Urien threatens to accuse Fidelis of theft, and leaves. Rhun witnesses this. Rhun suggests to Brother Edmund that Fidelis sleep in Brother Humilis's room. That night, Humilis wakes to discover his friend on the cot. He sees an old gold ring on the chain around his neck. Thus Brother Humilis confirms the truth about his faithful mute companion.