Silver Dagger Award Winner: In this medieval mystery, Brother Cadfael faces suspicion when one of his herbal ingredients is used to kill a man.

Gervase Bonel is a guest of Shrewsbury Abbey of Saint Peter and Saint Paul when he suddenly takes ill. Luckily, the abbey boasts the services of the clever and kindly Brother Cadfael, a skilled herbalist. Cadfael hurries to the man's bedside, only to be confronted with two surprises: In Master Bonel's wife, the good monk recognizes Richildis, whom he loved before he took his vows--and Master Bonel has been fatally poisoned by...