The carrier shall not be liable for the loss of or damage to monies, negotiable securities, gold, silverware, jewellery, ornaments, works of art, or other valuables, except where such valuables have been deposited with the carrier for the agreed purpose of safe-keeping in which case the carrier shall be liable up to the limit provided for in paragraph 3 of Article 8 unless a higher limit is agreed upon in accordance with paragraph 1 of Article 10.