Explain the following terms with reference to the Indian Contract Act, 1872: i) Pledge by mercantile agent

Pledge by mercantile agent: According to section 178 of the Indian Contract Act, 1872, a mercantile agent, who is in the possession of goods or document of title, with the consent of owner, can pledge them while acting in the ordinary course of business as a Mercantile Agent. Such Pledge shall be valid as if were made with the authority of the owner of goods. Provided, Pawnee acted in good faith and had no notice that Pawnor has no authority to pledge.