10. Delegation of authority.

An agent has no power, without the authority of his principal, to delegate his agency to another1. It follows that an auctioneer2 employed to sell must, in general, effect the sale himself3. Thus, he cannot delegate to his clerk4, unless the principal has clearly assented. Different considerations would arise where the principal instructs a firm of auctioneers rather than an individual, but it would seem that even then only a person practising as an auctioneer would be impliedly authorised