My Familys HUF

My gransfather passed away and left his whole estate as HUFand the eldest Uncle took charge of it.
He is now reaching 90 and requested all heirs to sign a Power of Attorney and he will sell the lot and give us the moneydue.
Unfortunately one brother decided to ask for the past accounts and how he derived a figure.
The whole family is now not on talking terms and have just kept relations for the sake of.

How can one know what their ancestors HUF is and w was it managed.

Best regards

K V Patel
E Mail: kundan54@aol.com
Ahmedabad