northwards to Swindon. It splits again at a roundabout along New Road and Oxford Street into the town centre on the High Street. The High Street is a traditional main thoroughfare for an English market town, in that it is wide, with space for market stalls on either side and in the middle, though these spaces are usually marked for car parking. Until the late 1980s most of this section, and some of the following Wiltshire section, was configured as three lanes, with the central lane available for overtaking traffic in either direction. This is no longer considered safe so the road now has one wider-than-normal lane in each direction, with ghost islands at junctions to discourage overtaking at these points. Marlborough to Chippenham (18.9 miles) The A4 continues along the High Street on its way out of Marlborough via Bridewell Street and Bath Road. The road passes underneath a covered bridge that links Morris House of Marlborough College to the North Block of the same establishment. The college is an independent boarding school established in 1843 using some of the buildings that remained after the demise the coaching trade, which saw the original Castle Inn Coaching House close. The route continues westward through the village of Fyfield, across Overton Hill where there is a parking area at the start of the Ridgeway National Trail and through the village of West Kennett. On leaving West Kennett there are some lay-bys where visitors can walk a short distance from the road to the Neolithic West Kennet Long Barrow, which forms part of the Avebury World Heritage Site. One mile further along the A4 is Silbury Hill, which is also part of the Avebury World Heritage Site. A purpose built car park is located beyond the hill on the right travelling westward. As the route approaches the Beckhampton roundabout, which forms the intersection with the A361, it passes by the Waggon & Horses Inn, built in 1669 to profit from the increasing trade along the old Bath Road. It is mentioned in The Pickwick Papers by Charles Dickens. The route continues past Cherhill. The Cherhill White Horse can be seen to the left, and nearby the Lansdowne Monument. The route then descends the Labour in Vain Hill through the village of Quemerford and into the market town of Calne. Heading towards the town centre, the road crosses a double mini roundabout, one