One X wrote defamatory letter against Y, a copy of which he sent to the Chairman of the Municipal Committee and other for publication in a local newspaper in which it was duly published. Y sued X and the editor, publisher and management of the newspaper for damages. Subsequently, a sum of Rs. 5,000 was paid by the newspaper by way of damages to Y and an apology was also published in the newspaper. Thereupon Y withdrew his action against the newspaper but not against X. X pleads that the release of other joint tort-feasors amounted to his release also