In this session we ensured that the floor was swept of
all loose material. Why was this necessary? Apart from the obvious reason that
an unswept floor doesn’t look cared for and is off-putting to visitors, dust
can cause damage to the floor. Some parts of the floor are made from ledger
stones (inscribed memorial stones) in various materials. These are showing
damage; on some black patches adhere to the stones and make them more difficult
to read, on others the surface is breaking down as the stone laminates off in
little pieces. Water on the floor can react chemically with both the stones and
the dust lying on them to cause damage such as the black patches. You may have
been as surprised as I have been to walk into the crypt and find puddles of
water in the middle of the room, caused by condensation onto the colder floor.
The very high amount of condensation means that the ventilation panels in the
windows have to be open all the time. Unfortunately this also allows dust to
enter the building. There has been a lot of demolition and building work in the
streets around the church which means that lately the dust problem has been
worse than usual. Apart from causing chemical damage to the floor dust also
acts as an abrasive when people walk over it and this too wears away the stone.
So on Sunday we tackled the floor and swept in clean of
loose grit and dust with soft brooms. Then I started to clean the engraving on
one of the ledger stones with a toothbrush and a natural brush. I did not get
far as it takes longer than you would think. What delighted me was to find my
name on the stone – Maria.
An especially big thank you to John Bowkett and Peter
Shannon for their enthusiastic help in keeping St John’s in good preservation.
Our next Conservation Cleaning session will be on Tuesday 26th July
when we will be tacking the Ringers’ Chamber between 6.30-8.30pm – do come and
join us. Or if you would like to know more about the stonework at St John’s
look out for an event on September 7th with Sally Strachey – details
to follow.
Maria Fenner