I want the source of this quote from a work of fiction: "In spite of his friend Queenie's patient explanation

Question

of tangents, secants and sines, he had never had a really firm grasp of the principles of spherical trigonometry; his navigation had been a plain rule-of-thumb progress from A to B, plane-sailing at its plainest."

Answer 1

The Wharf by the Docks by Florence Warden

or

BARROW, John. Navigatio Britannica: Or a Complete System of Navigation


Not really sure