Brogden v Metropolitan Railway Co (1877) concerned a dispute between a coal merchant and a railway company. The House of Lords had to decide whether a contract existed and if so, what the terms of the contract were. The facts of the case can be set out as the following four statements.

(a) After the railway company had taken coal from Brogden for many years, the company sent Brogden a written agreement which set out the position as regards future supplies of coal.

(b) Brogden altered the written agreement, then signed it and sent it back to the company.

(c) The company filed the agreement in a drawer, leaving it there for two years.

(d) Brogden delivered coal, which the company had ordered, in accordance with the altered agreement.

Each of the four statements above amounts to one of the following: an offer; an invitation to treat; a revocation; a counter offer; a contract; or nothing at all. Decide which of these matters each of the statements amounts to. (In reaching your decision you should apply at least three of the cases which we have considered in this chapter.)