The site of the cache overlooks the building that used to be 'The Royal West Sussex Hospital' (now a housing development). The building was opened in 1826 but there was a public dispensary established in some cottages on the site of the hospital in 1784.
From 1829 until 1913 the hospital had the rather long title of 'The West Sussex, East Hampshire and Chichester General Infirmary and Dispensary'. In 1913 a grant of King George V renamed the Infirmary to the shorter version of the name. The building continued to serve the public until 1972 when it was closed following the commissioning of the development of St Richard's Hospital nearby.
When the infirmary was built a Wisteria was planted in front of the hospital. The Wisteria, received from China by the hospital's first matron, Mrs. Rogers, is claimed to be the oldest specimen of its kind in England. When the hospital claimed the Wisteria was retained.