Sentence:  Upon this he brought me a cotton bag and giving it to me, said, "Take this bag and fill it with pebbles from the beach and go forth with a company of the townsfolk to whom I will give a charge respecting thee. Do as they do and belike thou shalt gain what may <WSD>further</WSD> thy return voyage to thy native land." 
Meaning of the word marked with <WSD> tags:  To help forward; to assist.