Possible Clues:

• Self-employed swimmer in a foreign country
• Self-employed worker erected shelter in the country
• Not tied to employer, fish in the country
• Self-employed getting weapon for nothing
• Medieval mercenary rejecting shelter in country
• Catching fish in the country, without regular work?
• Independent swimmer has reached Calais?
• Working independently, suggests slippery poisson?
• Not on the payroll
• Fish in the country, not regularly employed