Sentence:  I must go down to the seas again, to the vagrant gypsy life,/ To the gull's way and the whale's way, where the wind's like a whetted knife;/ And all I ask is a merry yarn from a laughing fellow-<WSD>rover</WSD>,/ And quiet sleep and a sweet dream when the long trick's over. 
Meaning of the word marked with <WSD> tags:  One who roves, a wanderer, a nomad.