| Generall demands concerning the late covenant (1638) by Alexander Henderson | | |
| God made visible in his workes, or, A treatise of the externall vvorkes of God (1641) by George Walker | | |
| Gods eye on his Israel. Or, A passage of Balaam, out of Numb. 23.21 (1645) by Thomas Gataker | | |
| Gods glory in mans happiness: with the freeness of his grace in electing us (1654) by Francis Taylor | | |
| Gods three arrovves: plague, famine, svvord, in three treatises (1631) by William Gouge | | |
| Gotteschalci, et prædestinatianæ controversiæ ab eo motæ, historia (1631) by James Ussher | | |
| Grammatica linguae anglicanae cui praefigitur de loquela sive sonorum formatione tractatus grammatico-physicus (1674) by John Wallis | | |
| Gravissimae quæstionis, de Christianarum Ecclesiarum (1613) by James Ussher | | |
| Heavenly treasure, or Mans chiefest good (1656) by William Strong | | |
| His Majesties concessions to the bill of abolition of arch-bishops and bishops, &c. stated and considered. (1648) by Richard Vines | | |
| Historia dogmatica (1689) by James Ussher | | |
| Hobbiani puncti dispvnctio (1657) by John Wallis | | |
| Hobbius heauton-timorumenos (1662) by John Wallis | | |
| Huls pillar of providence erected (1644) by Thomas Coleman | | |
| Hunc librum (1650) by Obadiah Sedgwick | | |
| Iacobi Usserii Armachani Chronologia Sacra (1660) by James Ussher | | |
| Iacobi Usserii Armachani de Romanæ Ecclesiæ symbolo apostolico vetere, aliisq (1657) by James Ussher | | |
| Ianitor animæ: the soules porter, to cast out sinne, and to keepe out sinne (1638) by William Price | | |
| Ievves in America, or, Probabilities that the Americans are of that race (1650) by Thomas Thorowgood | | |
| Imitation and caution for Christian woman (1659) by Edward Reynolds | | |
| Immanuel (1638) by James Ussher | | |
| In Polycarpianam epistolarum Ignatianarum syllogen annotationes (1644) by James Ussher | | |
| In quibus, praeter Maccabaicam et Novi Testamenti historiam (1654) by James Ussher | | |
| Independencie a great schsim proved against Dr. Owen his apology in his tract of schism (1657) by Daniel Cawdrey | | |
| Influences of the life of grace (1659) by Samuel Rutherford | | |
| Institutio logicæ (1687) by John Wallis | | |
| Instructions to a son (1661) by Archibald Campbell | | |
| Interiora regni Dei (1655) by Francis Rous | | |
| Irenicum in quo casus (1654) by John Dury | | |
| Irenicum; or, An essay towards a brotherly peace & union, between those of the congregational and presbyterian way (1659) by Matthew Newcomen | | |
| Irenicum: to the lovers of truth and peace (1646) by Jeremiah Burroughs | | |
| Item, tractatus grammatico-physicus de loquela sive sonorum formatione (1688) by John Wallis | | |
| Jacobs thankfulnesse to God, for Gods goodnesse to Iacob (1624) by Thomas Gataker | | |
| Jews in America, or Probabilities, that those Indians are Judaical (1660) by Thomas Thorowgood | | |
| Johannis Wallis, S.T.D. Geometriæ Professoris Saviliani, in celeberrima academia Oxoniensi; atque Regalis Societatis Londini sodalis; Grammatica linguæ Anglicanæ (1674) by John Wallis | | |
| John Dury his petition to the Honourable House of Commons in England (1641) by John Dury | | |
| Just re-proposals to humble proposals (1650) by John Dury | | |
| Katabaptistai kataptüstoi. The dippers dipt, or, the Anabaptists dvck’d and plvng’d over head and eares, at a disputation in Southwark. (1645) by Daniel Featley | | |
| King Charles his welcome home (1641) by John Bond | | |
| King Charls his case: or, An appeal to all rational men, concerning his tryal at the High Court of Iustice (1649) by John Cook | | |
| Lettre du sieur Jean Dury touchant l’estat présent de la religion en Angleterre, Escosse et Irlande (1658) by John Dury | | |
| Lex, rex: The law and the prince. A dispute for the just prerogative of king and people (1644) by Samuel Rutherford | | |
| Lieut. Colonel J. Lilburn tryed and cast: or, his case and craft discovered (1653) by Arthur Hesilrige | | |
| Light for smoke (1646) by John Ley | | |
| Logos autopistos, or, Scriptures self-evidence (1667) by Thomas Ford | | |
| Logou Alogia, seu, Exercitatio theologica de insipientiâ rationis humanæ, gratiâ Christi destitutæ, in rebus fidei. (1655) by Robert Crosse | | |
| Loiola Scena et Amsterodami (1648) by John Hacket | | |
| Lyford’s legacie; or, An help to young people (1656) by William Lyford | | |
| Madam, although my former freedom in writing might rather give me occasion to beg pardon for a fault committed (1645) by John Dury | | |
| Male audis or An answer to Mr. Coleman his Malè dicis (1646) by George Gillespie | | |
