Carrol---Fer instance ? Terry
Though for me exercise could (sometimes) restore focus. But only during
the exercise. Fortunately it is possible to read while pedalling an
exercycle, and I read the whole of Adam Smith's "Wealth of Nations_ in
that manner. Also Marx's _Theories of Surplus Value_ (3 vols) and a
history of the South Sea Bubble. I'm thinking of resorting to that to
read the remaining 1000 pages of Richardson's Clarissa, though it's a
bit bulky to balance on the reading rack.