arranged in alternating squares forming a chequerwork pattern. The dressings are in stone, and the roof is tiled. Its plan is that of a rectangle with a narthex projecting to the west. The entrance has a moulded Tudor arched surround, with the date 1897 in the spandrels. On each side of the narthex is a two-light window, and above it is a four-light window. Above this is a stone cornice, and a brick gable with a stone coping. On the roof is a 20th-century octagonal wooden bellcote, with an ogee-headed cupola. At the corners of the chapel are stone quoins. Along the north and south sides are three-light windows, and a brick parapet. Between the windows on the north side is a 19th-century brick buttress. At the east end is a four-light window, above which is a brick gable containing a plaque with the dates 1612 and 1963. Interior The chapel contains a double row of stalls facing each other in collegiate fashion. The west door is surrounded by a doorcase consisting of carved Corinthian pilasters and an entablature. The reredos contains two twisted Solomonic columns framing panels containing the Ten Commandments, and outside them are panels with the Lord's Prayer and the Creed. At the top of the reredos is an open pediment enclosing a flaming urn. Above the central panels is a cartouche, and over the side panels are smaller closed pediments. The sanctuary is paved with black and white marble. The roof is in five bays. The wooden font dates from the 17th century. It has an octagonal base, a richly carved circular bowl, and a dome-shaped cover. From the roof hangs an eight-branch candelabrum. In the chapel is a wall tomb to Sir James Altham, who died in 1616, and his last wife Helen, who died in 1638. It consists of two praying figures facing each other in an alabaster and marble frame, consisting of Corinthian columns and an open segmental pediment containing a cartouche flanked by obelisks. At the west end is a marble memorial tablet to John Askill Bucknall dated 1797 by C. Regnant. See also List of churches preserved by the Churches Conservation Trust in the East of England References Further reading External links Photographs of the exterior, the font and the reredos Grade II* listed churches in Hertfordshire Church of England church buildings in Hertfordshire English Gothic architecture in Hertfordshire Churches preserved