law of contracr

William wrote to Joshua on 3rd, offering to sell his machinery for $3000. The letter contained the following information. ‘Notice in writing of your acceptance must be received by me at 19th’.Joshua decided to accept and posted his acceptance on 9th. Joshua had called William personally but he was not there and left a message on Williamis mother, Stephanie confirming the acceptance of the offer. Joshua had since discovered that William never received the letter of acceptance and that Stephanie had forgotten to inform him of the telephone conversation. William had sold the plant to Joseph. Explain weather William will be liable for the breach of contract.