The various trades formed guilds or corporations, and those who wished to enter one of these had to be apprenticed for a fixed number of years in order to learn the craft. As we have seen, slaves could be thus apprenticed by their owners and in this way become members of a guild. What the exact relation was between the slave and the free members of a trading guild we do not know, but it is probable that the slave was regarded as the representative of his master or mistress, who accordingly became, instead of himself, the real member of the corporation. We perhaps have a parallel in modern England, where a person can be elected a member of one of the “city companies,” or trade guilds, without being in any way connected with the trade himself. Since women in Babylonia were able to carry on a business, there would be no obstacle to a slave being apprenticed to a trade by his mistress. Hence it is that we find a Babylonian lady named Nubtâ, in the second year of Cyrus, apprenticing a slave to a weaver for five years. Nubtâ engaged to provide the apprentice with clothing and 1 _qa_ (nearly 2 quarts) of grain each day. As in ancient Greece a quart of grain was considered a sufficient daily allowance for a man, the slave’s allowance would seem to have been ample. The teacher was to be heavily fined if he failed to teach the trade, or overworked the apprentice and so made him unable to learn it, the fine being fixed at 6 _qas_ (about 10 quarts) _per diem_. Any infringement of the contract on either side was further to be visited with a penalty of 30 shekels of silver. As 30 shekels of silver were equivalent to £4 10s., 6 _qas_ of wheat at the time when the contract was drawn up would have cost about 1s. 3d. Under Nebuchadnezzar we find 12 _qas_, or the third part of an ardeb, of sesame sold for half a shekel, which would make the cost of a single quart a little more than a penny. In the twelfth year of Nabonidos 60 shekels, or £9, were paid for 6 _gur_ of sesame, and since the _gur_ contained 5 ardebs, according to Dr. Oppert’s calculation, the quart of sesame would have been a little less than 1½d. When we come to the reign of Cambyses we hear of 6½ shekels being paid for 2 ardebs, or about 100 quarts, of wheat; that would give 2½d. as the approximate value of a single _qa_. It would therefore have cost Nubtâ about 2½d. a day to feed a slave.