RICHARD STORRS WILLIS. MARY STUART. It is at once a remarkable fact and a striking exemplification of the vitality of poetic justice in history that, from among modern Scotch Puritans, from the spiritual descendants of John Knox, should have come three of the noblest and most effective modern vindications of Mary Stuart. We refer to the work by Mr. Hosack noticed in our last number, to that which we make the subject of the present article,[37] and to the poem of Bothwell,[38] one of the finest in the entire range of English literature. Professor Aytoun's poem is accompanied by a body of historical notes, which are in themselves a model of legal argument and dialectic power, covering the entire period of the history of Mary Stuart in Scotland. And yet these three writers are very far from being looked upon by their countrymen as the holders of singular opinions. It may be news to many persons, but it is, nevertheless, the fact that they merely reflect the prevailing feeling in Scotland concerning its unfortunate queen of three centuries agone, murdered in an English prison. The sentiment of the great body of the Scotch people, gentle and simple, Puritan and Catholic, is to this day decidedly in her favor, and the superficial reader who, trusting to a superficial Froude, sneers at Mary Stuart, is safer from reproof in New York than in Edinburgh. Mr. Caird's work, of which the second edition was published last year, appears to be made up of the material of a series of lectures delivered by him in some of the Scotch cities, and, like Mr. Hosack's work, is marked with evidences of great research, ability, and a thorough knowledge of the country, the people, and the times under discussion.