Entered through the archway in the West Range, that had been blocked for over 100 years before Sackville-West and Nicolson's arrival, the Top Courtyard is dominated by the Tower. Planted against a new wall constructed on ancient foundations is the Purple Border, a colour palette deliberately chosen by Sackville-West in defiance of Gertrude Jekyll's dictum against massing purple flowers. The gardening writer Tony Lord considers it "the courtyard's greatest glory". The height of the Tower attracts considerable wind which necessitates intensive staking of the plants, particularly the taller specimens such as Sackville-West's much-favoured "Rosa moyesii". On the opposite side of the Tower is the Tower Lawn, also known as the Lower Courtyard; Nicolson emphasised that "the English lawn is the basis of our garden design". The west–east vista from the Top Courtyard, through the Tower gateway, across the Tower Lawn, and to the statue of Dionysus across the moat, forms one of the most important horizontal axes. It bisects the north–south axis running from the White Garden, across the Tower Lawn, to the Roundel in the Rose Garden. In the southwestern corner of the Tower Lawn is a small garden known as the Sunk Garden. It was created in 1930 as the Lion Pond, but the pond was prone to leaking and was drained in 1939. The site was subsequently considered for planting what became the White Garden, but was ultimately rejected as too confined, shady, and damp. The Trust is considering reinstatement of the pool.