Shape: Long, narrow

Features: Channel cut in stone

Function: Channelled water

‘The undecorated appearance of this stone suggests that it was

meant to go unseen – probably high up. It is weathered, implying

that it was on the outside of the cathedral, and has a channel cut

into it. This tells us that it is a piece of guttering, used to throw rain

water away from the building and stop it damaging the walls. It may

once have been lined with lead.’

Dr Kirsty Owen

Specialist in medieval architecture