Beside Fisherton bridge stands a local landmark. This typically Victorian tower is a loving memorial. A Salisbury doctor, John Roberts, paid for it in 1892 in memory of his wife, Arabella. It has an illuminated clock with four dials. The tower was built on the site long occupied by the city gaol. There was a prison here by 1421. Georgian masonry from the last prison is incorporated in the base of the tower.