Besides reaching the peak of naval skills and authority, Aubrey is presented as being interested in mathematics and astronomy, a great lover of music and player of the violin, a hearty singer and is generally accompanied by his friend and shipmate Stephen Maturin on the cello. He is noted for his mangling and mis-splicing of proverbs, sometimes with Maturin's involvement, such as “Never count the bear’s skin before it is hatched” and “There’s a good deal to be said for making hay while the iron is hot.”