The publications of Williams, that have reached us, are not voluminous. The public services in which he was engaged, and the private difficulties which he had to encounter, undoubtedly prevented them from being so. The first, in order of time, is his “Key to the Language of America,” now republished. This, it would seem, was composed during his voyage to England in 1643, and was printed at London soon after his arrival. It preceded Elliot’s publications on the same subject, and was highly commended by the Board of Trade, at the time it was published. Very few copies of the original edition are now extant. The one belonging to the Massachusetts Historical Society is the only one known to be in this country. A strain of ardent piety runs through this work which cannot fail to recommend both itself and its author to the reader. It presents the character of the Natives in a new and favorable light, and appears to have been admirably calculated to facilitate that intercouse with them, which the safety of the settlers and the interests of both settlers and natives imperiously demanded. The next work was his “Bloody Tenent,” written in answer to Cotton’s work upholding the right and enforcing the duty of the civil magistrate to regulate the doctrines of the Church. This work called forth a reply from Cotton, entitled “The Bloody Tenent, Washed and made White in the blood of the Lambe.” And this was followed by a rejoinder from Williams, entitled “The Bloody Tenent yet more Bloody, by Mr. Cotton’s endeavor to Wash it White.” In these works of Williams the doctrine of religious liberty and unlimited toleration are illustrated in strong language and supported by stronger arguments--arguments that preceded those of Locke, Bayle and Furneau. The character and standing of Cotton made him an antagonist, with whom to contend, was glorious, even though vanquished, but with truth on his side, and supported and strengthened by a sense of it, Williams entered the contest, and was not vanquished. Accompanying this last, are two letters, one to Gov. Endicott and the other to the Clergy of Great-Britain and Ireland. The first of which, if it had been read with the spirit in which it appears to have been written, would have stayed the arm of Persecution in New-England. These were published in London in 1652. About twenty years after, Williams had a controversy with the Quakers. He maintained a public dispute with them at Newport, on the 9th, 10th and 12th, and at Providence, on the 17th August, 1672. Afterwards he published his “George Fox digged out of his Burrows,” in answer to a work of Fox. This is a rare book.