 The Walks are the gardens within Gray 's Inn , and have existed since at least 1597 , when records show that Francis Bacon was to be paid £ 7 for " planting of trees in the walkes " . Prior to this the area ( known as Green Court ) was used as a place to dump waste and rubble , since at the time the Inn was open to any Londoner . In 1587 four Benchers were ordered by the Pension to " consider what charge a brick wall in the fields will draw unto And where the said wall shalbe fittest to be builded " , and work on such a wall was completed in 1598 , which helped keep out the citizens of London . 
