defendants' property to Josphine Mary vide Ex.B4 sale deed and in such view of the matter, when B.A.Viswanatha Chetty is not having any other house site immediately lying to the north of the defendants' property or to the north of Rahamath Ali's property purchased under Ex.B2, the case of the plaintiff that B.A.Viswanatha Chetty had alienated the house site lying to the north of the defendants' property or Rahamad Ali's property to Sandhana Mary vide the sale deed dated 20.01.1981 marked as Ex.A1, as such, cannot all be accepted and believed. When the house site lying to the north of the defendants' property had been already conveyed by the original owner B.A.Viswanatha Chetty to Josphine Mary vide Ex.B4 sale deed dated 25.09.1980, it is for the plaintiff to establish as to how come her vendor Sandhana Mary had purchased the same northern site from B.A.Viswanatha Chetty. In Ex.A1 sale deed, the property comprised therein had been described as lying to the south of the house site belonging to Josphine Mary and north of the house site belonging to Kothi Bacha. When admittedly B.A.Viswanatha Chetty had already conveyed the house site lying to the north of Kothi Bacha to Josphine Mary vide Ex.B4 sale deed, it is evident that the property comprised in Ex.A1 sale deed had not been correctly described and further more, when the said house site had been already conveyed by B.A.Viswanatha Chetty to Josphine Mary vide Ex.B4 sale deed and in Ex.B4 sale deed, the house site comprised therein has been shown as lying to the south of the house site belonging to B.A.Viswanatha Chetty and north of the house site belonging to Rahamath Ali, how by giving the same description, B.A.Viswanatha Chetty would be entitled to convey the house site to Sandhana Mary vide Ex.A1 sale deed, there is no proper explanation on the part of the plaintiff. Therefore, as rightly contended by the defendants' counsel, when the original owner B.A.Viswanatha Chetty had sold the house site belonging to the first defendant's vendor Rahamath Ali vide Ex.B2 sale deed and subsequently, when he had sold the house site lying to the north of the same to Josphine Mary vide Ex.B4 sale deed, B.A.Viswanatha Chetty would be incompetent to sell the very same house site already sold to Josphine Mary vide Ex.B4 sale deed to Sandhana Mary vide Ex.A1 sale deed. Therefore, when the plaintiff's vendor is not entitled to claim the title to the house site already sold to Josphine Mary vide Ex.B4 sale deed on the strength of Ex.A1 sale deed, it is evident that Sandhana Mary would not be competent to convey the house site lying to the north of the defendants' property to the plaintiff under the sale deed dated 14.12.1981.