Stanmore is part of the London Borough of Harrow in London. It is centred northwest of Charing Cross, lies on the outskirts of the London urban area and includes Stanmore Hill, one of the highest points of London, at high. The district, which developed from the ancient Middlesex parishes of Great and Little Stanmore, lies immediately west of Roman Watling Street (the A5 road) and forms the eastern part of the modern London Borough of Harrow. Stanmore is the location of the former RAF Bentley Priory station – base of the Fighter Command during both world wars – along with its accommodating Bentley Priory mansion, notably the last residence of Queen Adelaide. Some members of the Bernays family were also based here, including Adolphus Bernays and his son and grandson who were both rectors of St John's church; the Bernays Institute and Bernays Gardens are public amenities in the centre of the old village. The district increasingly developed into a London suburb during the 20th century, and in the latter half housed the Automobile Association's regional headquarters. Today it is a commuter town with a local tube station that is the northern terminus of the Jubilee line, and large green spaces. The place earliest documented use of the name comes from a charter of 793, when land in Stanmore was granted to St Albans Abbey. The Domesday book of 1086 records the two manors of Stanmore as Stanmere, the name deriving from the Old English stan, 'stony' and mere, 'a pool'. There are outcrops of gravel on the clay soil here and the mere, which gave the manors their name, may have been one of the ponds which still exist. One possible candidate is a pond on Stanmore Common still sometimes known as Caesars Pond after a battle believed to have taken place in the vicinity in 54BC. An obelisk on Brockley Hill, in the grounds of the Royal National Orthopaedic Hospital, marks the reputed site of a battle between Julius Caesar's Roman legions and the local Catuvellauni tribe, under Cassivellaunus.