If you dont have survey number nor the date of registration of title deeds or the registration no of the title deeds, then its quite difficult on your part to know about these lands. Does not the will contain any recitals about those properties, their descripttions etc????
Anyone can be an attesting wittness to a will. Its not dependent on the religion of that person. However, in your case the case of your brothers is certainly lilttle bit weak one because the attesting wittnes herself is a party interested in the subject matter. So it would be little advatageous on your part, when the question of veracity of her evidence would come during trial of the case....
Anyways madam, though my prima facie suggests that I am a female, I am a male....
With Regards
Ambika Prasad Mishra