Simplify the following text for a Grade 12 native English-speaking person.
Original: the Norman Robert the Mason gave particular attention to solid foundations , running a continuous wall of layered bricks , flints and mortar below and pushing the foundations down to twelve feet to hit bedrock .
Simplified: Robert gave particular attention to solid foundations , running a continuous wall of layered bricks , flints and mortar below and pushing the foundations down to twelve feet to hit bedrock .