In a unilateral contract,one party known as the offeror makes a promise in exchange for an act by another party known as the offeree. If the offeree act on the offeror's promise,the offeror is legally obliged to fulfil the contract, but an offeree cannot be forced to act or not act,because no return promise has been made to the offeror. (Elliot,et al,2011,pp.12-13)
In Carlill v Carbolic Smoke Ball Co [1893] the company promised to any £100 to anyone who caught influenza after using their product. However, once any person bought it and started using it, the company was bound by its promise. this is an example of a unilateral contract, when the offeror act on the offeree promise.
Based on the facts, regarding the case which we are dealing with, a unilateral contract has been formed between the auctioneer known locally and trade under the name of "Lewis Marrs&Co" , employed by Felix and the general public.
An invitation to treat, is an advertisement about goods displayed in the window for the open public, in order to invite the eventually buyers. In auctions, the bids themselves are the offers, each bidder making an offer to buy, which then is accepted by the auctioneer bringing down his hammer.
According with what the judge decided in Harris v Nickerson (1873), "an advertisement that an auction is to take place at a certain time is a mere of declaration of intention and is not an offer which those who attend at the specified time thereby accept".(Elliot,et al,2011,p.13) Under the Sale of