Sentence:  The Sons of Mary seldom bother, for they have inherited that good part; / But the Sons of Martha favour their Mother of the careful soul and the troubled heart, / ... / It is their care that the wheels run truly; it is their care to embark and entrain, / Tally, transport, and deliver duly the Sons of Mary by land and <WSD>main</WSD>. 
Meaning of the word marked with <WSD> tags:  The high seas. (from 16th c.)