Carvings inside and out appear to show corn which was not known about when the chapel was built but other opinion is that it is an idealised carving and only coincidentally resembles corn.
Photographs are actually courtesy of my lovely husband as my camera wasn't up to the job.
One story of the chapel has stayed in my mind and that's the tale of the Sculptor's apprentice who, while his master was away, finished one of the columns in the chapel to a higher standard than his master and without reference to the original design pattern. When the master returned he was so enraged that he hit the apprentice on the head with a hammer and killed him. Legend has it that the master's image was carved on a column opposite so that he could forever gaze on his apprentice's work (Wikipedia link here).
Here's the link to Chris Gray's blogpost that spurred me on to finally blog about our visit.