Porter was author of the following Latin works:[1]
Securis Evangelica ad Hæresis radices posita, ad Congregationem Propagandæ Fidei, Rome, 1674, second edition dedicated to
Roger Palmer, 1st Earl of Castlemaine
Palinodia religionis prætensæ Reformatæ, Rome, 1679; dedicated to Cardinal
Alderano Cybo.
Compendium Annalium Ecclesiasticorum Regni Hiberniæ, exhibens brevem illius descriptionem et succinctam Historiam, 1690; dedicated to
Pope Alexander VIII. It contains an epistle to the author, by
Francesco Eschinardi, a Jesuit, on errors in maps of Ireland. Porter drew heavily on
James Ussher and
James Ware. The last section of the Appendix contained contemporary history down to the end of 1689, with an account of the
siege of Derry (taken from letters written in May, July, and September 1689), and of the
Patriot parliament at Dublin. Porter concluded with blaming
Martin Luther for all the evils of Ireland.
Systema Decretorum Dogmaticorum … in quo insuper recensentur præcipui cujuslibet Sæculi, errores, adversi Impugnatores orthodoxi; item Recursus et Appellationes hactenus ad sedem Apostolicam habitæ, cum notis historicis et copiosis indicibus,
Avignon, 1693; dedicated to Cardinal
Fabrizio Spada.
Opusculum contra vulgares quasdam Prophetias de Electionum [sic] Summorum Pontificum, S. Malachiæ … hactenus falso attributas, Gallice primum editum, nunc novis supplementis auctum et in Latinum idioma translatum: adjunctis celebrium Authorum [sic] reflectionibus et judiciis de Abbatis Joachimi Vaticiniis, ejusque Spiritu Prophetico, Rome, 1698.