The Rose Garden was constructed on the site of the old kitchen garden from 1937. It terminates the north–south axis running from the White Garden and concludes with a brick wall, designed by A. R. Powys and known as the Powys Wall, constructed in 1935. Old garden roses, those bred before 1867, formed the heart of the garden's planting. Such roses appealed not only for their lavish appearance, but also for their history. The informal and unstructured massing of the plants was Sackville-West's deliberate choice, and has become one of Sissinghurst's defining features. Roses were supplied by, among others, Hilda Murrell of Edwin Murrell Ltd., notable rose growers in Shropshire, and the florist Constance Spry from her home Winkfield Place. In addition to using established suppliers and receiving plants as gifts from friends, Sackville-West sometimes sourced specimens herself. Sarah Raven records Sackville-West digging up the hybrid perpetual rose 'Souvenir du Docteur Jamain' at an old nursery; Anne Scott-James noted that the rose had passed out of commerce and it was Sackville-West who returned it to cultivation. The Rose Garden is divided by the Roundel, constructed of yew hedging by Nicolson and Nigel in 1933. As elsewhere in the garden, the Trust has replaced the original grass paths with stone and brick, to cope with the increases in visitor numbers. Scott-James considered the roses in the Rose Garden "one of the finest collections in the world". The writer Jane Brown describes the Rose Garden, more than any other including the White, as expressing "the essence of Vita's gardening personality, just as her writing-room enshrines her poetic ghost".