What does it mean to tell a story “like a lesson?”

I had never seen the squire so near at hand. He was a tall man, over six feet high, and broad in proportion, and he had a bluff, rough-and-ready face, all roughened and reddened and lined in his long travels. His eyebrows were very black, and moved readily, and this gave him a look of some temper, not bad, you would say, but quick and high.

"Come in, Mr. Dance," says he, very stately and condescending.

"Good evening, Dance," says the doctor with a nod. "And good evening to you, friend Jim. What good wind brings you here?"

The supervisor stood up straight and stiff and told his story like a lesson;