Gabool, meanwhile, is slowly being driven insane. Graypatch decides to return to his ship but is killed by Oak Tom, a squirrel allied with Redwall. Clary and Thyme, along with Pakatugg, are killed freeing slaves from Graypatch's camp. The denizens of Redwall, meanwhile, defended the Abbey against Graypatch, a searat on the run from Gabool's army, and his horde. Lord Rawnblade also joins the four comrades later on to help them defeat Gabool in his fortress of Bladegirt, where he commands a fleet of searat and corsair ships. She befriends a young fieldmouse named Dandin, a hedgehog named Durry Quill, and a hare that carries an instrument called a harolina named Tarquin Longleap Woodsorrel, and together they journey to Gabool's island of Terramort to defeat him. He is given the task to lead Mariel to Redwall, where the woodlanders help her regain her memory. Three members of the Long Patrol, Colonel Clary, Brigadier Thyme, and the Honorable Rosemary, escort Mariel to a squirrel named Pakatugg. Spoiler warning: Beginning here are 'spoiling' details that will spoil the story plot and contain plot surprises. She took the name 'Storm Gullwhacker', and gave the name 'Gullwhacker' to the rope she had used to fight off a seabird. After attacking Gabool, the mouse was thrown into the sea and washed up on the shore, causing her to lose her memory. It had been carrying a bell to Lord Rawnblade Widestripe in Salamandastron, and that, too, was seized by Gabool. The protagonist, Mariel Gullwhacker, was enslaved by Gabool the Wild when her father Joseph's ship, the Periwinkle, was captured.

As she regains her memory while at Redwall Abbey, however, she swears vengeance against Gabool the Wild, the searat who had tried to slay her. When a young mousemaid loses her memory in a shipwreck, she takes the name 'Storm Gullwhacker' after a successful encounter with a seagull. It is the fourth book in the Redwall series. Mariel of Redwall is a fantasy novel by Brian Jacques, published in 1991.

Mariel of Redwall by Brian Jacques