In returning my thanks to your correspondents who have given instances of
this custom, allow me to add that a friend has called my attention to the
fact that Mattishall _Gant_, or fair, takes place in Rogation or _Gang
week_, and probably takes its name from the latter word. Forby says that
there are probably few instances of the use of this word, and I am not
aware of any other than the one he gives, viz. Mattishall _Gant_.