In my long experience I have remarked how little the range of "literary" reading has varied, and how doubt still centres on matters which were cruces in my early years. So that a work of this kind is of as much usefulness in 1891 as it would have been in 1830. I have always read with a slip of paper and a pencil at my side, to jot down whatever I think may be useful to me, and these jottings I keep sorted in different lockers.