Thomas was the author of three short works on theology and biblical exegesis, and the compiler of the Manipulus florum ('A Handful of Flowers').
Although Thomas was apparently a member of the secular clergy, his anthology was highly successful because it was "well suited to the needs of the new mendicant preaching orders ... [to] ... locate quotations ... relevant to any subject they might wish to touch on in their sermons.
"[4] Indeed, Boyer has demonstrated that very soon after the Manipulus was completed a French Dominican used it to compose a series of surviving sermons.
[7] Thomas was also among the earliest pioneers of medieval information technology that included alphabetical subject indices and cross-references.
"[4] Those finding tools are preserved, and electronically enhanced, in Nighman's online critical edition of the Manipulus florum.