This is a poem in which Sir Thomas Wyatt, after having worked in Spain for a long time on behalf of England, says farwell to Spain by addressing the river Tagus, on which he is sailing out of the country and back to England. This short poem focuses on the way in which it is his loyalty to King and country that impels him to leave his post and Spain:
My king, my country, alone for whom I live,
Of mighty love the wings for this me give.
Note the way that Wyatt declares his loyalty and love for both his King and homeland, and it is this love that gives him the "wings" he needs to journey back to England. The poem contains many allusions, such as the reference to Brutus, who was supposedly a descendent of Aeneas who had a dream from the Goddess Diana which sent him to Albion to found a city, which became London.