"33. To prove the genuineness of Ex.A13, the plaintiff has taken steps in I.A.No.734/01 in the trial court to compare the original signature contained in Ex.A13, along with original signature of Karuppanna Gounder, contained in a document, dated 12.5.1967 produced in O.S.274/85 on the file of trial court, which has been marked as Ex.B1, in that suit. The said document has been sent from that suit to the present suit in I.A.262/01 to compare the disputed signature in Ex.A13 that the admitted signature on 12.5.1967, the original sale deed. Both documents were sent to Forensic Scientific Laboratory Department on handwriting expert, Government of Karnataka in Bangalore. No report was given by the expert on the ground that they do not have Tamil knowledge to compare the signature. Once, if expert express their inability, in order to render justice, the lower court ought to have compared the disputed signature with the admitted signature by using the power given in Section 73 of Evidence Act. The trial court, even though have empowered to compare the signature contained in Ex.A13 along with the signature contained in document dated 12.5.1967 does not done so. On careful perusal of the original signature of Karuppanna Gounder, contained in document dated 12.5.1967,