ON

[Footnote 1: For Dury's biography, see J. Minton Batten, _John Dury,
Advocate of Christian Reunion_ (Chicago: University of Chicago Press,
1944).]

[Footnote 2: On the relation of Dury, Hartlib, and Comenius, see G.H.
Turnbull, _Hartlib, Dury and Comenius_ (Liverpool: University Press of
Liverpool, 1947).]

[Footnote 3: Hugh Trevor-Roper, "Three Foreigners: The Philosophers of
the Puritan Revolution," in his _Religion, the Reformation, and Social
Change, and Other Essays_, 2d ed. (London: Macmillan, 1972), 240.]

[Footnote 4: On the philosophical and theological theories of Dury,
Hartlib, and Comenius, see Richard H. Popkin, "The Third Force in
Seventeenth-Century Philosophy, Scepticism, Science, and Biblical
Prophecy," _Nouvelles de la Republique des Lettres_ (Spring 1983), and
Charles Webster, _The Great Instauration: Science, Medicine, and Reform,
1626-1660_ (London: Duckworth, 1975).]

[Footnote 5: Quoted in Turnbull, 257.]

[Footnote 6: _Athenae Oxonienses_, vol. 2 (London, 1692), col. 400.]

[Footnote 7: The omitted works are _An Idea of Mathematicks_ by John
Pell (pp. 33-46) and _The description of one of the chiefest Libraries
which is in Germanie_, attributed either to Julius Scheurl or J.
Schwartzkopf (pp. [47]-65, in Latin). This seems to be the first
printing of _The description_, which was published separately at
Wolfenbuttel in 1653. John Pell's essay was written around 1630-34 and
was prepared for publication in 1634 by Hartlib, but was only actually
published as an addition to _The Reformed Librarie-Keeper_. It was of
some importance in making mathematics better known at the time.]

[Footnote 8: "John Durie's _Reformed Librarie-Keeper_ and Its Author's
Career as a Librarian," _The Library_, 1st ser. 4 (1892), 82.]

[Footnote 9: Ruth Shepard Granniss, "Biographical Sketch," _The Reformed
Librarie-Keeper_ (Chicago: A.C. McClurg & Co., 1906), 31-32.]

[Footnote 10: See "John Durie's _Reformed Librarie-Keeper_," 83.]

[Footnote 11: Richard Garnett, "Librarianship in the Seventeenth
Century," in his _Essays in Librarianship and Bibliography_ (New York:
F.P. Harper, 1899), 187.]

BIBLIOGRAPHICAL NOTE

_The Reformed Librarie Keeper With a Supplement to the Reformed School_
(1650) is reproduced from the copy in the Folger Shakespeare Library
(Shelf Mark D2882/Bd w/D2883). A typical type page (p. 7) measures 107 x
56 mm. Not reproduced here are two additional parts in the original
vo