Courtney's _Register_ lists some 30,000 titles in a main and two supplementary alphabets. The rapid growth of the material as he proceeded with his work explains this inconvenient division. The very numerous citations of bibliographies in non-bibliographical works contribute to this large figure. I cannot estimate closely the number of small headings, which run into the thousands. The bulk of the _Register_ and the ease with which it can be used make it valuable. As examples of the wealth of information in it, I cite his references to thirteen bibliographies of bacteriology, seventeen bibliographies of hymns, nine bibliographies of insanity, and three bibliographies of swimming. One will rarely leave the _Register_ empty-handed. Courtney could have greatly reduced the size of his book without a sacrifice of convenience or the loss of significant references. His alphabetical arrangement makes it unnecessary to repeat the headings in the index. He could have profitably used the space saved to add a descriptive word that would differentiate the various works by one author. The dozen references to J. C. Pilling, who wrote bibliographies of American Indian languages, might, for example, have been identified by appropriate adjectives. Courtney could have reduced the size of his book substantially and without loss by omitting bibliographies printed in obvious places, to which one needs no reference. For example, he could have spared references to bibliographies in four editions of _Beowulf_. The poorly-organized longer articles in the _Register_ are often burdened with miscellaneous or unnecessary information. The article "Bibliography" includes, for example, the universal bibliographies by Georg Draud and Theophil Georgi, (but not Conrad Gesner); Olphar Hamst, _Aggravating Ladies_, which is a list of pseudonymous books written by "A Lady";[192] the bibliographical journal _La Bibliofilia_;[193] and a bibliography of church history. This is not a display of good workmanship. The article "Libraries" is a similar farrago of Namur's bibliography of bibliographies, Wheatley's book on how to make a library, Edward Edwards' book on libraries and their founders, Meusel's biographical dictionary of German artists, and other books of as little pertinence. There is very useful information to be gleaned from Courtney's _Register_ and one can easily find it in the chaff. We are still too close to the latest bibliographies of bibliographies to see them in a true perspective.[194] Efforts to make a comprehensive bibliography of bibliographies continue and a new development that was foreshadowed in Sabin's restriction of his work to a single language with "more than a few" titles added to fill it out is apparent in some less extensive but very excellent bibliographies of bibliographies.