By former English maritime law it became the mother of wages, as the crew were obliged to moor the ship on her return in the docks or forfeit them. So severely was the axiom maintained, that if a ship was lost by misfortune, tempest, enemy, or fire, wages also were forfeited, because the freight out of which they were to arise had perished with it. This harsh measure was intended to augment the care of the seamen for the welfare of the ship, but no longer holds, for by the merchant shipping act it is enacted that no right of wages shall be dependent on the earning of freight; in cases of wreck, however, proof that a man has not done his utmost bars his claim. Also, for the burden or lading of a ship. (See dead-freight.) Also, a duty of 50 sols per ton formerly paid to the government of France by the masters of foreign vessels going in or out of the several ports of that kingdom. All vessels not built in France were accounted foreign unless two-thirds of the crew were French. The Dutch and the Hanse towns were exempted from this duty of freight.