We have left ourselves but little space to notice the very rich and attractive Appendix, the first fifty pages of which are taken up with an "Explanatory and Pronouncing Vocabulary of the Names of Noted Fictitious Persons and Places," etc., by William A. Wheeler. The conception of such a work was singularly happy, as well as original, and, on the whole, the task has been executed with commendable fidelity and discretion. That occasional omissions and mistakes should be discovered will probably surprise no one less than the author. Attention has elsewhere been publicly called, in particular, to the fact that Owen Meredith is given as the pseudonyme of Sir Bulwer Lytton instead of his son, E. R. Bulwer: this would seem to be a bad blunder, but we understand that it was a mere error of oversight, and that it was corrected before the Dictionary was fairly in the market. If other mistakes should be brought to light,--and what work of such multiplicity was ever free from them?--Mr. Wheeler will doubtless call to mind, and his readers must not forget, the eloquent excuse which Dr. Johnson offers, in the preface to his Dictionary, for his own shortcomings:--"That sudden fits of inadvertency will surprise vigilance, slight avocations will seduce attention, and casual eclipses of the mind will darken learning; and that the writer shall often in vain trace his memory at the moment of need for that which yesterday he knew with intuitive readiness, and which will come uncalled into his thoughts to-morrow." The "Pronouncing Vocabularies of Modern Geographical and Biographical Names, by J. Thomas, M. D.," are evidently the product of laborious and conscientious research; and, while we differ widely from Dr. Thomas on various points, general and particular, we must allow that his vocabularies are as yet the only ones of the kind which approximate with any nearness to the character of an authoritative standard. The other Vocabularies or "Tables" of the Appendix seem also to have been prepared with sound judgment and much painstaking, but we cannot dwell upon them. To sum up, in all the essential points of a good dictionary,--in the amplitude and selectness of its vocabulary, in the fulness and perspicacity of its definitions, in its orthoepy and (_cum grano salis_) its orthography, in its new and trustworthy etymologies, in the elaborate, but not too learned treatises of its Introduction, in its carefully prepared and valuable appendices,--briefly, in its general accuracy, completeness, and practical utility,--the work is one which none who read or write can henceforward afford to dispense with.