Case Facts
The claimant, the Metropolitan Railway Company, had been receiving informal coal and coke deliveries from Brogden & Co., a Welsh coal mine owner, from the beginning of 1870, with no formal written agreement in place. In November 1871, Brogden's manager, Mr Hardman, proposed that the parties enter into a formal contract. Mr Burnett was appointed by the Railway Company to negotiate on its behalf. Following a meeting, a draft agreement was drawn up on 19 December 1871.
The material terms of the draft provided that Brogden & Co. would supply a minimum of 220 tons and a maximum of 350 tons of coal per week, commencing 1 January 1872, at a price of 20 shillings per ton. The contract was to run for one year, with a right of termination on two months' written notice given on or before 1 November 1872, and to continue for a further year from 1 January 1873 if no such notice was given.
Mr Brogden reviewed the draft, left the date blank, inserted the names of the parties, made several modifications, and — crucially — filled in the name of an arbitrator in the arbitration clause. He then wrote "approved" on the document and signed his own name, "Alexander Brogden." The document was returned to Mr Burnett via Mr Hardman, with the expectation that a formal contract would be drawn up in duplicate and executed by both parties.
Mr Burnett, however, simply placed the returned draft in his drawer. No formal entry was made in the Railway Company's books, and no formal acceptance was communicated to Brogden. Despite this, on 22 December 1871, Mr Burnett telegraphed requesting 250 tons per week of locomotive coal commencing no later than 1 January 1872. Mr Hardman replied confirming delivery of 250 tons weekly from that date. Both parties thus began performing in a manner consistent with the draft's terms. All coal supplied from 1 January 1872 was invoiced and paid for at the contract price of 20 shillings per ton — a price higher than that charged during the previous informal arrangement. This pricing was relied upon as a key piece of evidence pointing towards acceptance by conduct.
In December 1873, Brogden declined to continue supplying coal. The Metropolitan Railway Company brought an action for breach of contract. Brogden denied that any binding contract had ever come into existence, contending that, since the Railway Company had never formally executed the agreement, the draft remained a mere negotiating document. The Court of Common Pleas gave judgment in favour of the Railway Company and assessed damages at £9,643. The Court of Appeal affirmed that decision. Brogden then appealed to the House of Lords.
Held
The House of Lords dismissed the appeal and held that a binding contract did exist between the parties. Both parties had acted upon the terms of the draft agreement and treated it as binding, and they were accordingly bound by it, even though no formal instrument had ever been executed. The requirement for a formal document had been waived by the conduct of both parties.
Regarding the objection that Mr Brogden had signed the document in his own name rather than in the name of the firm "Brogden & Co.", the House of Lords rejected this argument, finding that the document had been signed on behalf of the partners and was therefore effective to bind the firm.
The appeal was dismissed and the award of damages of £9,643 in favour of the Metropolitan Railway Company was upheld.
Ratio Decidendi
The ratio of this case rests on two interconnected principles.
First, a binding contract may be formed by the conduct of the parties, even in the absence of any formal written acceptance. Where both parties have acted in accordance with the terms of a draft agreement and have treated that draft as binding upon them, the court will hold them to it — provided that it is clear they have waived the need for a formal document. Here, the Railway Company's continued ordering of coal and its payment of invoices at the contract price of 20 shillings per ton constituted an unequivocal acceptance of the counter-offer by conduct.
Second, Brogden's amendments to the draft — in particular, his insertion of the arbitrator's name and his other modifications before writing "approved" and returning the document — had the legal effect of destroying the original offer and substituting a counter-offer. The Railway Company did not accept that counter-offer in writing. However, its subsequent conduct in ordering and accepting coal strictly in accordance with the modified terms provided the external manifestation of acceptance required by law.
The analysis attributed to Lord Blackburn is especially significant: mere mental assent to a contract, without any outward act communicated to the other party, is not sufficient to constitute acceptance. The law requires some act or conduct from which acceptance can be inferred. In this case, the Railway Company's ordering and accepting of coal at the stipulated contract price satisfied that requirement and gave rise to a binding obligation.
Obiter Dicta
The observations concerning the necessity for an external, communicated manifestation of acceptance — as opposed to purely internal or unexpressed agreement — have been treated as carrying wider significance beyond the specific facts. Although these observations were integral to the reasoning, they have influenced the development of the general principle that an offeree cannot accept an offer by merely thinking about it: acceptance must, in some form, be made known to the offeror, whether expressly or by unequivocal conduct. This principle has been applied and developed in subsequent cases on acceptance by conduct, including Felthouse v Bindley (1862), which confirmed that an uncommunicated mental acceptance is legally ineffective.