Suit property, the subject matter of the agreement to sell has been transferred in favour of a third party – interest of a third party is also involved in the decision of the suit – No doubt, by rule of lis pendens, subsequent purchaser is bound by the decree, who steps into the shoes of the vendor, and may not be a necessary party for adjudication of the dispute between the plaintiff and the original defendants, but at the same time, it cannot be said that the presence of the purchaser in the suit proceedings would be improper also.