All students of Chaucerian chronology are agreed that Troilus and Criseyde was written not earlier than the poet's first Italian journey of 1373, and not later than 1386. The second of these terminal dates is fixed by the fact that the earlier, so-called B, version of the Prologue to the Legend of Good Women, which refers to Troilus as already in circulation, is assigned with a good deal of confidence to 1386 or 1387. It is further corroborated by the fact that Thomas Usk's Testament of Love, which shows extensive acquaintance with Troilus, seems to have been written in 1387, the year before its author's death.