William Bradford moved from Pennsylvania to New York in the spring of 1693, but what was the first product of his New York press has not been established.[10] The Library of Congress owns two Bradford imprints from this period, neither containing any indication of the place of publication. Nevertheless, both are listed in Wilberforce Eames' bibliography of early New York imprints.[11] One of them, entitled New-England's Spirit of Persecution Transmitted to Pennsilvania, and the Pretended Quaker Found Persecuting the True Christian-Quaker, in the Tryal of Peter Boss, George Keith, Thomas Budd, and William Bradford, at the Sessions Held at Philadelphia the Nineth, Tenth and Twelfth Days of December, 1692. Giving an Account of the Most Arbitrary Procedure of That Court, has been conjectured to be the first New York imprint (Eames 1). Eames states that the work "seems to be the joint production of George Keith and Thomas Budd, including Bradford's own account of the trial. As it mentions the next Court Session of March, 1693, it could hardly have been printed before May...." He confesses that Bradford may have printed it at Philadelphia. The Library of Congress purchased its copy—one of six recorded in the National Union Catalog—for $50 at the November 1876 auction of the library of Americana formed by a New York collector, William Menzies.

The other Bradford imprint conjecturally assigned to New York is Governor Benjamin Fletcher's proclamation of April 29, 1693, prohibiting "the Breaking of the LORDS DAY, all Prophane Swearing, Cursing, Drunkenness, Idleness and unlawful Gaming, and all manner of Prophaneness whatsoever" (Eames 9). Eames gives no reason why this broadside should be listed as a later imprint. An eminent New Yorker, Stuyvesant Fish, presented the unique copy to the Library of Congress in 1915 and in an accompanying letter to the Librarian told how it had come into his possession:

In view of the uncertain assignment of these two imprints to New York, the Library's earliest imprints naming New York as the place of publication should also be mentioned. A Catalogue of Fees Established by the Governour and Council at the Humble Request of the Assembly (New-York, William Bradford, 1693) is an 11-page work printed sometime after September 20, 1693. The Library's copy, like others, is appended to Bradford's printing of The Laws & Acts of the General Assembly (New-York, 1694), which in Eames' opinion was itself probably begun in 1693, perhaps as early as July or August. Among the owners of the volume containing these early imprints was the bibliographer Charles R. Hildeburn, who gave the following history in a note prefixed to an 1894 facsimile edition of The Laws & Acts:

Now in a full morocco binding by Bradstreet's, the volume contains the bookplates of Abram C. Bernheim, who lectured on New York history at Columbia College, Henry C. Bernheim, and Russell Benedict. At the New York auction of Judge Benedict's library in 1922 Halstead H. Frost, Jr., purchased it for $3,000; yet in 1926 at an auction by the same house of "Rare Americana including the collection of the late A. R. Turner, Jr. and selections from the collection of the late Charles A. Munn," the same copy drew only $1,800. In 1931 the Library of Congress obtained it from the firm of Lathrop C. Harper for $2,929.55, and it was duly noted in the subsequent annual report as "the most precious acquisition of the year by the law library."