There are good things which we want to share with the world and good things which we want to keep to ourselves. The secret of our favourite restaurant, to take a case, is guarded jealously from all but a few intimates; the secret, to take a contrary case, of our infallible remedy for seasickness is thrust upon every traveller we meet, even if he be no more than a casual acquaintance about to cross the Serpentine. So with our books. There are dearly loved books of which we babble to a neighbour at dinner, insisting that she shall share our delight in them; and there are books, equally dear to us, of which we say nothing, fearing lest the praise of others should cheapen the glory of our discovery.