Mr. X, a builder, contracts to erect and finish a house by the 1^st January, in order that Mr. B may give possession of it at that time to Mr. C, to whom Mr. B has contracted to let it. Mr. A is informed of the contract between Mr. B and Mr. C. Mr. A builds the house so badly that, before the 1^st January, it falls down and has to be rebuild by Mr. B, who in consequence, loses the rent which he have received from Mr. C and is obliged to make compensation to Mr. C for the breach of his contract.