It is understandable that there has been a good deal of joking about purely learned works of this type. Their actual value for the future of scholarship and for the people as a whole cannot be demonstrated. Nevertheless, scholarship, as was true for art in the olden days, must indeed have far-flung grazing grounds, and in pursuit of a subject which interests no one but himself a scholar can accumulate knowledge which provides colleagues with information as valuable as that stored in a dictionary or an archive.