[1] His major work, Tractatus de modis significandi seu Grammatica speculativa, was often misattributed to John Duns Scotus until 1922.
[1] Charles Sanders Peirce borrowed the name of the first branch of his system of logic, "speculative grammar", from Thomas.
[3] The Grammatica speculativa has been published with English translation and commentary by Godfrey Bursill-Hall (Longman, 1972).
Thomas' other works include commentaries on Porphyry's Isagoge, Aristotle's Categories and On Interpretation, and the anonymous Liber sex principiorum.
He also wrote a pedagogical poem on grammar, Commentarius in carmen ‘Fundamentum puerorum’.