Endowed with gifts of natural eloquence, his public addresses furnished many examples of persuasive and graceful oratory. Among the conspicuous occasions that made demands upon his ability as a public speaker was the dedication of the public library building. On that occasion his address was interposed between those of the Honorable Edward Everett ard the Honorable Robert C. Winthrop, both of whom were men of the highest and most elegant culture, possessing a national reputation for finished eloquence. The position in which the young Boston merchant found himself was an exceedingly difficult and trying one; but he rose most successfully to its demands, and nobly surpassed the exacting expectations of his warmest admirers. It was agreed on every hand that Mayor Rice's address was fully equal, in scope and appropriateness of thought and beauty of diction, to that of either of the eminent scholars and orators with whom he was brought into comparison. It received emphatic encomiums at home, and attracted the flattering attention of the English press, by which it was extensively copied and adduced as another evidence of the literary culture found in municipal officers in this country, and of American advancement in eloquence and scholarship. At the close of Mr. Rice's second term in the mayoralty of Boston, he declined a renommation. While in that office, he was faithful to the men who had elected him, and abstained from participation in party politics farther than in voting for selected candidates. Originally, he was an anti-slavery Whig, and, upon the formation of the Republican party, he became identified with it.