Walter returns to the original goal of the
Tristrapoedia: educating Tristram in a radical new way. Walter’s allusion to the Northwest Passage, the sea route from the Atlantic to the Pacific over the north coast of North America, refers to a hypothetical, secret method to circumvent regular education (the first successful journey across the Northwest Passage did not take place until 1906). Walter believes this intellectual Northwest Passage is linguistic: auxiliary verbs add tenses, emphases, and other qualifications to sentences, modifying the main verbs. Trim confuses this meaning of “auxiliary” with the military term, which refers to an affiliated but separate unit, in this case the Danish soldiers attached to the British army. Walter is shocked and impressed that Toby catches this distinction.