"Learn French, and if possible German. Learn a little book-keeping, and become well acquainted with accounts, and the use they can be put to when properly kept. Without a knowledge of accounts, you will never be able to carry out large works with economy, or ever become thoroughly acquainted with the cost of work, which is of the first importance to an engineer."
January 1, 1970
https://en.wikiquote.org/wiki/Alexander_McDonnell_(engineer)