I knew a gentleman, who was so good a manager of his time, that he would not even lose that small portion of it, which the calls of nature obliged him to pass in the necessary-house; but gradually went through all the Latin poets, in those moments. He bought, for example, a common edition of Horace, of which he tore off gradually a couple of pages, carried them with him to that necessary place, read them first, and then sent them down as a sacrifice to Cloacina: this was so much time fairly gained; and I recommend you to follow his example. It is better than only doing what you cannot help doing at those moments; and it will made any book, which you shall read in that manner, very present in your mind.
– Earl of Chesterfield
(Letters to His Son…, letter 21)