Property Sold illigally?

[nann]

Dear Sir,
My grand father had a huge land 5 Bigha(5*20 Kotha).We are son-in-law and daughter-in-law of him.

Son-in-law sold the land without informing me(daughter-in-law) about 6 years ago, 2 years back (Son-in-law)

died in .Now when the party(who purchase) went for mutation , he is not getting mutation , now he is contacting

us through lawyer for our singing.

Our problem is as the property belongs to grandfather, we know the land mark of the land , we do not know

the identification mark of the Land . My question is

1)Is there any way of searching by owner name (last 10 years) and location (mauja)

2)if it is , can we get copy of paper(dadil) from court

3)if there any lawyer of reference who can help us(immediately)