...itude of cool detachment from it. Longfellow was too much of an artist to lose his head over philosophical abstractions; Whittier, at his best, had a too genuine poetic instinct for the concrete; and Lowell and Holmes had the saving gift of humor. Cultivated Boston gentlemen like Prescott, Motley, and Parkman preferred to keep their feet on the solid earth and write admirable histories. So the mell...