In 1874, the Town of Brookline authorized the purchase of land at Grove Street and Allandale Road to supplement the town's colonial burying ground. Ernest Bowditch provided a design in 1875 that respected the natural quality of the gently undulating site, punctured by outcroppings of Roxbury puddingstone. A Brookline native, Bowditch also laid out residential subdivisions in the Waban, Aberdeen, and Chestnut Hill sections of the town. Walnut Hills pioneered in the control of monuments: in 1886, all markers were restricted to uniformly scaled slate stones (later expanded to include Quincy granite as an alternative). Important burials here include the graves of architects Henry Hobson Richardson and Guy Lowell, landscape architect John Charles Olmsted, and Charles Sprague Sargent, first director of the Arnold Arboretum (JP4).