Summer is icumen in

14th Century round

Sumer is icumen in, lude sing cucu
Groweth sede and bloweth mead and springs the  wood anew
Sing cucu, yow now bleteth after lamb, loweth after calve cu
Bullock starteth, buck now verteth, merrye sing cucu
Cucu, cucu, well singest thou cucu, nor swick tha naver now