Hercule Poirot always kept a healthy and symmetrical balance in his bank: four hundred and forty-four pounds, four and four pence. That's not easy to do! But what about investments? Hastings proposes that he buy shares worth three hundred pounds in an oil field promising a yield of 100% in one year! In response, Poirot says, "There's no need for speculative behavior." He explains that, for the exercise of his little grey cells, he was once rewarded with fourteen thousand shares of the Burma Mines Ltd. Hastings wants to know more. So do we! Librarian's note: this entry is for the story, "The Lost Mine." Collections of short stories by the author can be found elsewhere on Goodreads. The individual entries for all Poirot short stories can be found by searching Goodreads for: "a Hercule Poirot Short Story."