Possible Clues:

• Sounds like you knit just for a bit of work
• Just a little work will get you to the end of the lough
• Little work and that's the last of the lough
• There could be a little work for five hundred for the lough
• Thus a little work will get you to the end of the big lough
• Just a little work, therefore it needs nothing more
• With little work, five hundred could make a lot of water with this
• Five hundred could work to make a lough of it
• Just a little work is needed for five hundred to make a lough of this
• So little work, therefore it could be over nothing