You see, under the terms of their father's will, while John inherited the property, Lawrence, at his stepmother's death, would come into a considerable sum of money. 
John was left off his father's will.
mnli hypothesis: John was left off his father's will. premise: You see, under the terms of their father's will, while John inherited the property, Lawrence, at his stepmother's death, would come into a considerable sum of money. 