Reference
Note:
North's dating does not distinguish between 10cf3 Mayfiled and 10cf3b- varieties with later lettering which continues in 10cf4 and 10cf5. There is a case for dating 10cf3b to 1309. See Stewartby, English Coins 1180-1551, pp.131-7 for further chronological detail within Class 10. Stewartby classes X, Primary Phase, sub classes 1-6 and Secondary Phase, sub classes 1-6 correspond directly with North class 10 sub classes, pp.42-53, described by Wood.
