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. 
Lawrence and John would both become rich due to inheritance.
mnli hypothesis: Lawrence and John would both become rich due to inheritance. 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. 