Originally published in 1910, this book attempts to describe knowledge from the point of view of a philosophical psychology. Wodehouse treats the text as a 'psychological preface to metaphysics', and splits her examination into three sections: knowledge as resulting from judgements in the actual world; the philosophical problem of fallible knowledge; and the question of imagination and 'the variousness of reality'. This book will be of value to anyone with an interest in Wodehouse's work or in the overlap of psychology and philosophy.