== "sons of Harpenden" == 

 "Killing the Lawyers" by Reginald Hill has a citation from a charge by the sheriff which says "nor shall it be taken as mitigation of rudely laying they hands on a citizen and breaking his head, to say that thou mistook him for a Son of Harpenden.  But against such as are known by certain signs to be Sons of Harpenden, whose depravations and depredations are notorious amongst sober Christian folk, then lay on amain!" (p. 26, beginning of cap. iii)  I presume this is fictitious, but a) should it be in references and b) is there a notorious rivalry between Harpenden and Luton? (the novel takes place in Luton)