Some facets are declared in ringing/peal.h. These facets are available in some of the built-in library types.
rw_refstring, contains a reference to the method's
appearance in the Ringing World.
     first_tower_pealpeal, contains the date and place of the
first tower bell peal in the method.
     first_hand_pealpeal, contains the date and place of the
first handbell peal in the method. 
The last two are of type peal, which is a class also declared in
ringing/peal.h.  It is a very simple class and defines the
following functions.
These functions construct objects in the obvious way.
The peal::date type is also very simple.
     struct peal::date {
       int day, month, year;
     };