Book of Aneirin), a manuscript dating from c. 1265. Llywarch Hen and Heledd The poetry associated with Llywarch Hen, Canu Llywarch Hen and with Heledd, Canu Heledd, dates from a somewhat later period: the whole of Canu Heledd is generally thought to be from the 9th century; while the earliest parts of Canu Llywarch are probably also 9th century, other parts of the cycle may be as late as the 11th or 12th century. These poems, in the form of monologues, express the sorrow and affliction felt at the loss of the eastern portion of the Kingdom of Powys (present day Shropshire) to the English, but they are also works where nature is an important element in the background, reflecting the main action and feelings of the poetry itself. Other early poetry Though the Anglo-Saxon invaders seem to break Welsh hearts in most of the early poetry, there are some poems of encouragement and the hope of an eventual and decisive defeat that would drive them back into the sea. One such poem is the 10th-century Armes Prydein from the Book of Taliesin which sees a coalition of Irish, British, and Scandinavian forces defeating the English and restoring Britain to the Welsh. This period also produced religious poetry, such as the englynion in praise of the Trinity found in the 9th-century Juvencus Manuscript (Cambridge MS Ff. 4.42), which is now at Cambridge University Library. In the Book of Taliesin we find a 9th-century poem Edmyg Dinbych (In Praise of Tenby, a town in Pembrokeshire), probably produced by a court poet in Dyfed to celebrate the New Year (Welsh: Calan). The book also includes important poems which were probably not composed by Taliesin, including the Armes Prydein (The Great Prophecy of Britain) and Preiddeu Annwfn, (The Spoils of Annwn), and the Book of Aneirin has preserved an early Welsh nursery rhyme, Peis Dinogat (Dinogad's Smock). Much of the nature poetry, gnomic poetry, prophetic poetry, and religious poetry in the Black Book of Carmarthen and the Red Book of Hergest is also believed to date from this period. Welsh poetry 1100–1600 From c. 1100 to 1600 Welsh poetry can be divided roughly into two distinct periods: the period of the Poets of the Princes who worked before the loss of Welsh independence in 1282, and the Poets of the Nobility who worked from 1282 until the period of the English incorporation of