The south entrance is a fine example of a Norman arch with two orders of zig-zags crowning a medieval panelled door. On the right hand side of the east colonette framing the door there are some incribed lines radiating down from holes drilled into the stone. These are Mass Dials. In an age without clocks, and before the 16th century porch was built, a straw inserted into the hole would cast a shadow to tell whether or not they were in time for Mass.