Recently we moved into our vicarage, built on the grounds of the orchard for the old vicarage, hence have a garden full of old fruit trees including apples, quince, cherry and plums. The damason trees have been fantastic this year, but one of these tree had larger fruit than the rest, when making jam (a kind parishener did this) the jam from this one tree was lighter, tasted different and stones were different, someone else has suggested it's a 'dams eve' tree - I've never heard of it, is there such a thing?