 He wrote two "tensos" which survive, one with Lanfranc Cigala and another (fragmentary) one with Simon Doria.There are several "Giacomo Grillos" mentioned in thirteenth-century documents from Genoa and it is difficult to definitively identify the troubadour with one.Chronologically, the Giacomo mentioned in an act of 15 August 1281 was probably not the troubadour.