Above the treble
The Association of Ringing Teachers http://ringingteachers.org/
Also sometimes known as a tail stroke, this is the stroke rung with the ringer's hands on the tail, rather than on the sally.
Ball of the clapper
Bell chamber, usually at the top of the Church Tower, where the bells are housed.
Bell advisor (Diocesan)
An expert on bells, usually appointed by the Diocese to advise on bell related matters. Sometimes abbreviated to DAB (Diocesan Bell Advisor).
The engineering works where bells are cast. Often bell foundries will also be able to advise on / carry out bell maintenance work, augmentations, re-hangs and repairs. Many foundries also supply ropes, stays and other sundries.
This is the space in the bell pit in which a bell hangs (and swings).
Bell restoration fund
A fund set up by a tower or local ringing society to fund projects which restore, maintain or install bells.
Below the treble
A bob causes three bells to rotate in the coursing order and is generally the most common type of call.
Another term for ceiling
Boxes round the treble
The extended piece of work at the back of Cambridge (in the last two places of the change)