| 1. | John had mused a few moments he recommenced as imperturbably and with as much acumen as ever. - from Jane Eyre by Charlotte Bronte |
| 2. | For a man who was never in the country, and who did not evidently do much in the way of business, his knowledge and acumen were wonderful. - from Dracula by Bram Stoker |
| 3. | The loss of the digamma, that _crux_ of critics, that quicksand upon which even the acumen of Bentley was shipwrecked, seems to prove beyond a doubt, that the pronunciation of the Greek language had undergone a considerable change. - from The Iliad of Homer by Homer |