The poem is remarkable for its astronomical allusions, which are fully explained in the notes. The story of Mars and Venus was doubtless taken from Ovid, _Metam._ iv. 170-189. The story of the brooch of Thebes is from Statius, ii. 265, &c.; see note to l. 245.
I shall here add a guess of mine which possibly throws some light on Chaucer's reason for referring to the brooch of Thebes. It is somewhat curious that the Princess Isabel, in a will made twelve years before her death, and dated Dec. 6, 1382, left, amongst other legacies, 'to the Duke of Lancaster, a _Tablet of Jasper which the King of Armonie gave her_'; see Furnivall's _Trial Forewords_, p. 82. Here _Armonie_ means, of course, Armenia; but it is also suggestive of _Harmonia_, the name of the first owner of the brooch of Thebes. It seems just possible that the brooch of Thebes was intended to refer to this tablet of jasper, which was doubtless of considerable value and may have been talked about as being a curiosity.
MSS. F. Tn. and Lt. are much alike; the rest vary. I follow F. mainly, in constructing the text.
This poem is undoubtedly genuine; both Chaucer and Lydgate mention it. It is remarkable as being the first of the Minor Poems which exhibits the influence upon Chaucer of Italian literature, and was therefore probably written somewhat later than the Complaint of Mars. It is also the first of the Minor Poems in which touches of true humour occur; see ll. 498-500, 508, 514-6, 563-575, 589-616. Dr. Furnivall (_Trial Forewords_, p. 53) notes that the MSS. fall into two principal groups; in the first he places Gg., Trin., Cx., Harl., O., the former part of Ff., (part of) Ar., and the fragments in Hh. and Laud 416; in the second he places F., Tn., D., and the latter part of Ff. Lt. also belongs to the second group. See further in _Anglia_, vol. iv. Anzeiger, p. 97. The whole poem, except the Roundel in ll. 680-692, is in Chaucer's favourite 7-line stanza, often called the ballad-stanza, or simply _balade_ in the MSS.
The poem itself may be roughly divided into four parts. The first part, ll. 1-84, is mainly occupied with an epitome of the general contents of Cicero's Somnium Scipionis. The second part, ll. 85-175, shews several instances of the influence of Dante, though the stanza containing ll. 99-105 is translated from Claudian. The third part, ll. 176-294, is almost wholly translated or imitated from Boccaccio's Teseide. And the fourth part, ll. 295 to the end, is occupied with the real subject of the poem, the main idea being taken, as Chaucer himself tells us, from Alanus de Insulis. The passages relating to the _Somnium Scipionis_ are duly pointed out in the notes; and so are the references to Dante and Claudian. The history of the third and fourth parts requires further explanation.