"The Wave" (Welsh: "I'r Don") is a Welsh-language cywydd by the mid 14th-century poet Gruffudd Gryg. It is a llatai poem, which is to say one in which an animal or inanimate object is sent bearing a message of love. In this case an ocean wave is sent by the poet's beloved in Anglesey, and reaches him as he returns by ship from a pilgrimage to Santiago de Compostella. It is thought to have been written in or about the 1370s. "The Wave" is a widely acclaimed poem, and has been compared favourably with the finest poems of Dafydd ap Gwilym, who is often considered the greatest of the Welsh poets.[1]