Partition

Dear Sir, My father has started a small scale industries by taking a machine rental from a Govt firm(SIDCO) in 1983.unfortunately the business not running well due to pollution issues and machine complaints. Later my father requested them to take back the machine but they did not taken the machine from us. After two years we have received a big rental amount along with a revenue recovery notice from our local village office and they forced us to pay at least a small amount then request for installment. My father did not paid anything and went to court and taken an injection stay order for the revenue recovery proceedings. My father has given all the documents to our advocate and given a power of attorney to my mother to run the case and then he went to abroad. Court has sent several notice to the Govt firm but they did not respond. Later my mother ignored about the case. Now my father is not alive. My sisters want their partition (property) amount from me. I have contacted our advocate to know the status of the case. He is in a bad situation and he dont have any document with him even the case number. then i contacted to our local village office, they checked their records and told us that all the officers and transferred from the same office they don’t have any records stating a case like this. My property (cost 80 Lakhs) is belongs to my fathers after his death we have equal share. I have two sister and mother, my sisters want their partition amount 20 lakhs each (total 40 lakhs). That is my whole life savings and I am ready to give. I have checked the machine price on the internet came to know the cost of is around 50 lakhs. My worry is that if I paid 40 lakhs to my sisters to owing the property, later govt come again with case or revenue recovery I will lose for ever. I even don’t know anything much about case because these things happening when I was 3-5 year old. My questions is 1) Is there any possibility to search old documents from district court using year? If yes what is the procedure? 2) My father took the machine and he is not alive now, Still that rental agreement is valid? 3) Court has sent several reminders to them to present, but their advocate did not present. These things help us? 4) This rental agreement has signed around 34 years back with my father. Still they didn’t came. This time frame will help us?