1) Is POA obtained from POA holder valid? 2) If 2 POAs executed for same property, which is valid?

Facts of the case are: 1. POA with consideration was executed to 'P' by the owner (ancestral property) of a plot on 01.1.1989 2. POA with consideration was executed to 'Q' also by the owner for the same plot on 01.10.1989 (Same site No. was mentioned by oversight instead of the adjacent site No.) 3. The owner died on 01.07.1991, leaving behind his wife as his sole heir 4. 'Q' executed a subsequent POA (coupled with interest) to 'R' on 01.03.1991 5. 'P' got an agreement of sale (ratified) executed in his favour by the wife of deceased owner on 01.10.1996 along with new POA as a continuity of PoA dated 01.10.1989 5. 'R' executes a Sale Deed in favour of his own son (say 'S') on 01.07.1998 and stakes claim over the property trying to disposses 'P' 6. Wife of the owner and 'R' & 'S' being neighbours have colluded now and wife denies the execution of agreement of sale. Now P has filed a Suit (in the year 1999) for specific performance and for declaring sale deed as null and void, with following defendants No.1 - Wife of the Owner No.2 - Q No.3 - S In the Suit, Q (the 2nd defendant has not contested and hence made Ex-parte) Since Def.No.1 denied her signature in cross-examination, the court ordered her appearance for want of standard handwriting, signatures specimen and LTMs. But she never turned up, instead challenged the Court's order in High Court which was dismissed without being even admitted. And hence, the learned court has observed in a IA order that her failure to be present for testifying of her signature AN ADVERSE INFERENCE can be drawn. Kindly tell me what would be the outcome of the case? Regards Padmavathi