Those that spend the greater part of their time in reading or writing books are, of course, apt to take rather particular notice of accumulations of books when they come across them. They will not pass a stall, a shop, or even a bedroom-shelf without reading some title, and if they find themselves in an unfamiliar library, no host need trouble himself further about their entertainment. The putting of dispersed sets of volumes together, or the turning right way up of those which the dusting housemaid has left in an apoplectic condition, appeals to them as one of the lesser Works of Mercy.