_Purwell Mill_, on the river Purwell or Pirrel, 1 mile E. from Hitchin, stands near the spot where the tesselated pavement of a Roman villa was discovered many years ago, in excellent preservation. PUTTENHAM (11/2 mile S. from Marston Gate Station, L.&N.W.R.) lies near the Clinton chalk hills, in the extreme W. of the county, on the Bucks border. The church, close to the village, is of several periods, parts of the structure being E.E. and other portions Perp. and Tudor. Several portions should be carefully noted: (1) very large embattled W. tower, built of blocks of Ketton stone with flints laid in squares between each block; (2) roof of nave, thought to date from _temp._ Edward IV.; with two shields under the ridges, one bearing the arms of Zouch, the church having belonged to the Priory of Ashby; (3) solid oak pews, probably coeval with nave roof. The S. porch was rebuilt in 1889. The vill of Puteham belonged to Leofwin, brother to Harold Godwin; William I. gave it to his half-brother, Odo, Bishop of Bayeux. _Queen Hoo Hall._ (See Bramfield.) _Rabley Heath_ (1 mile S.W. from Knebworth Station, G.N.R.) adjoins Sallow Wood. Knebworth and Codicote churches are about equidistant (11/4 mile), N.W. and S.W. respectively. RADLETT, with station on M.R. (main line), is about 5 miles S. from St. Albans, on the high-road from the Marble Arch to that city. Seen left from the train the neighbourhood is very pretty, the spire of the church showing among the trees some distance before the station is reached. The cruciform church is modern (1864), E. Dec. in style, with several good windows of stained glass. A picturesque ramble may be taken by turning into any lane in the vicinity, especially towards the Valley of the Colne, W. A potter's kiln of the Roman Age was discovered here.