In this case, the defendants, who were dealers of wool, had on September 2, written to the plaintiffs, woollen manufacturers, offering to sell to them a number of fleeces. They required an answer "in course of post". The letter was misdirected by the defendants, and consequently was not received by the plaintiffs until September 5. On the same evening, the plaintiffs wrote an answer, agreeing to accept the offer on the terms proposed. The acceptance did not reach the defendants until September 9. On September 8, the defendants, not having received an answer on September 7, as they had expected (which they would have, if their letter had not been misdirected), sold the wool to a third party.