In the book "The Ionian Mission" by Patrick O'Brian, there is a humorous reflection on the education received by young gentlemen at sea. It emphasizes the focus on mathematical subjects like trigonometry and algebra, suggesting that their curriculum is heavily leaning towards these complex topics. The exclamation “Heaven preserve us” indicates a lighthearted exasperation with the level of academia expected from them.

This quote provides insight into the challenges faced by young seamen during their training. It illustrates the contrast between the romantic notions of naval life and the rigorous, sometimes overwhelming, intellectual demands placed on them. O'Brian's writing often blends humor with serious themes, and here, he captures the delicate balance between education and the realities of life at sea.