Erbkam states that his unprinted writings would make more than another four folios.
Neckam also wrote Corrogationes Promethei, a scriptural commentary prefaced by a treatise on grammatical criticism; a translation of Aesop into Latin elegiacs (six fables from this version, as given in a Paris MS., are printed in Robert's Fables inedites); commentaries, still unprinted, on portions of Aristotle, Martianus Capella and Ovid's Metamorphoses, and other works.
The collection of his Opera Omnia Theologica (Amsterdam, 1681), folio, in a Dutch version, comprises twenty-three tractates, with reference to nine unprinted.
A collection of unprinted Garrick letters is in the Forster library at South Kensington.
The greater number of Martini's sacred compositions remain unprinted.