| (a) | - | A delivers a rough diamond to B, a jeweller, to be cut and polished, which is accordingly done. B is entitled to retain the stone till he is paid for the services he has rendered. |
| (b) | - | A gives cloth to B, a tailor, to make into a coat. B promises A to deliver the coat as soon as it is finished, and to give a three months' credit for the price. B is not entitled to retain the coat until he is paid. |