Here's a link to an earlier thread on this subject. I brink it up to respond to Mousethief's comment about ringing changes on 4 bells. The first post in the previous thread provides a link to Mike Chester's web site. Mike Chester is somewhat unusual in that he's rung several peals on 4 bells! On 4 bells, 24 changes can be rung before you start repeating yourself (we say the extent on 4 bells is 24). A peal, which is a length of ringing containing at least 5000 changes, must therefore contain 209 extents. How they ever keep count, or stave off the boredom, I don't know. But changes are possible on 4 bells (and on 3, as many towers less than overly subscribed with ringers can testify on a Sunday morning).