Maree & Lonnie: "Fowles in the Frith" is a Medieval English poem in the genre known as Lyric. The lines you quoted comprise the entire text of the poem as it has survived. Such lyrics were written during the literary/linguistic period known as Middle English (c.1150-c.1500), and were the result of the increasing popularity of the wandering minstrel during the Twelfth and Thirteenth Centuries in England. The music for this particular one has survived. I could go on, but I'm not sure about exactly what information you want. Let me know if you require more information.