In this chapter, Dr. Dolittle’s journey faces a critical turning point. As the swallows, exhausted from the arduous labor of dragging the ship through the sea, seek refuge in a nearby bay, the expedition makes a stop at the Canary Islands. The physical toll on the swallows is evident, as their "wings were sore" and they were "out of breath." This pause allows the doctor and his menagerie to set foot on land, but it is here that the narrative takes a dark turn.
Upon disembarking, Dr. Dolittle encounters a "large black rat" who delivers a chilling revelation. Adopting a tone of formal urgency, the rat explains that "all ships have rats on them" and warns the doctor that "rats leave a sinking ship." This biological intuition is described as a "tingly feeling in the ends of our tails," a sensation the rats experienced collectively that morning. The rat provides a damning assessment of their current vessel, noting that "the sides aren't strong enough" and "its boards are rotten." This dire prediction suggests that the ship is on the verge of collapse, forcing the doctor to reconsider the safety of his voyage.
The group finds respite on the Canary Islands, a place Dab-Dab identifies by the sound of the "canary singing." The island offers a stark contrast to the scarcity of the boat. The animals revel in the abundance of the land: the Push-Me-Pully-You enjoys "green grass," Gub-Gub delights in "tasty roots," and they discover a "valley of wild sugar cane" near a "fresh spring." This moment of tranquility, however, is short-lived.
The peaceful interlude is shattered when two swallows return with frantic news: "the pirates have arrived in the bay" and are currently "stealing everything" on the doctor’s boat. This threat triggers a sudden realization in Dab-Dab, who notes that if the pirates are occupying the doctor’s ship, their own vessel must be "empty."
Dr. Dolittle immediately recognizes the strategic value of this development. Describing it as a "splendid idea," he rallies his animals to abandon their current, rotting vessel and seize the pirate ship. The chapter concludes with a tense, stealthy operation; the group creeps toward the "pirate ship with its red sail," acting on the swallows' intelligence to turn the pirates' thievery into an opportunity for their own escape. By leaving the compromised ship and targeting the pirates' empty vessel, Dr. Dolittle demonstrates his ability to adapt quickly to life-threatening circumstances, turning the rats' warning and the pirates' greed into a potential path to safety.