The Commonwealth bought 30 more acres around Pennsbury Manor. Thomas Sears, a landscape architect who had trained under Frederick Law Olmstead, began designing the landscape in the Colonial Revival style. He had worked with Okie before on numerous projects. Sears’ design was based partially on letters between Penn and his gardener, Ralph Smith. However, Sears also had his own ideas about what the garden should look like and what would appeal to modern taste.