Different views from the sages in Nehardea, in the land of Israel, and elsewhere - with the dispute over whether the payment of a debtor returning the loan of a parent who has died is divided into a double portion for the eldest son. The crux of the matter seems to be whether the payment is in land or in cash - but that distinction is probed and found to be difficult. Also, when there's a great-grandmother (yes) and a great-granddaughter who dies before she inherits -- should her husband inherit from the great-grandmother because he would have inherited from his wife? (But would he have done so?)