of Truro cathedral. In medieval work, however, it will seldom be found in a chancel where no enlargement upon an early site has taken place; and it seems safe to conclude that, like so much else in medieval building which is irregular, it generally arises from the rebuilding of a fabric upon an encumbered site. INDEX OF PLACES Aachen, Rhenish Prussia, palace church, 33, 34 Acaster Malbis, Yorks., 65 Achurch, Northants., 56, 58 Acton Burnell, Salop., 55, 56, 58, 65, 102 Adderbury, Oxon., 106, 107 Adel, Yorks., 49 Africa, basilicas in north, 14 Aldwinkle, Northants., All Saints, 121; St Peter, 131 Almondsbury, Glouces., 54, 113 Alvington, West, Devon, 126 Amiens, France (Somme), cathedral, 68 Appleton-le-Street, Yorks., 84 Arksey, Yorks., 118, 121, 122 Askham Bryan, Yorks., 49 Avening, Glouces., 54, 114 Aylsham, Norfolk, 104 Bakewell, Derby, 70 Bampton-in-the-Bush, Oxon., 59, 60, 61 Barnack, Northants., 30, 32 Barnburgh, Yorks., 120 Barton-on-Humber, Lincs., St Peter, 30, 32, 33, 34, 40, 41 Berkeley, Glouces., 121 Beverley, Yorks., minster, 74, 75; St Mary, 102, 111, 112 Bewick, Old, Northumb., 50, 52 Bibury, Glouces., 94 Billingborough, Lincs., 82 Billingham, Durham, 73 Birkin, Yorks., 46, 51, 52, 82, 83 Bishopstone, Sussex, 36 Blatherwycke, Northants., 46 Bloxham, Oxon., 105, 106, 107 Bottesford, Lincs., 108 Bracebridge, Lincs., 28 Bradford-on-Avon, Wilts., 16, 29, 36 Bradwell-juxta-Mare, Essex, St Peter's on the Wall, 16 Brampton Ash, Northants., 76 Brancepeth, Durham, 120 Branscombe, Devon, 107 Brayton, Yorks., 46 Breamore, Hants., 38, 40, 54 Brecon, priory church, 121 Brigstock, Northants., 28, 97, 120, 121 Bristol, St John Baptist, 98; St Lawrence, 98; St Mary Redcliffe, 95, 99, 101, 102, 128 Britford, Wilts., 36 Brixworth, Northants., 21, 22, 23, 24, 29, 32, 53 Broughton, Lincs., 32 Bubwith, Yorks., 93 Burford, Oxon., 60, 61, 99, 113 Caistor, Lincs., 45 Cambridge, All Saints, 97, 98; St Benedict, 28; Holy Trinity, 97; St Michael, 94, 95 Campsall, Yorks., 109, 110 Canterbury, Kent, cathedral, 15, 35; St Pancras, 15, 16, 23, 24, 35, 36, 53 Caunton, Notts., 93 Cawston, Norfolk, 104, 125 Chesterfield, Derby, 123 Chichester, Sussex, cathedral, 68 Childs Wickham, Glouces., 56, 58 Chipping Norton, Oxon., 99 Christon, Som., 53 Cirencester, Glouces., 87, 88, 89, 125 Clapton-in-Gordano, Som., 105, 120 Clare, Suffolk, 126 Clymping, Sussex, 114 Coln Rogers, Glouces., 28, 29, 97 Coln St Aldwyn, Glouces., 113, 114 Coln St Denis, Glouces., 53 Cologne, Rhenish Prussia, St Gereon, 34