According to a venerable local tradition, St Cedd is supposed to have preached beneath an ancient oak tree in the grounds near Polstead Church. The tree is identified with a very large tree stump situated in the edge of the grounds of Postead Hall, just a stone's throw from the church tower. What is encouraging is that a smaller oak tree has now grown up beside the ancient tree stump, presumably from one of the acorns from this tree. Whilst we have no way of verifying this claim it is highly plausible that St Cedd did indeed preach here, perhaps whilst on his way through Suffolk towards his other Monastery at Lastingham in Yorkshire. We know that St Cedd was active as a missionary priest and then Bishop in Suffolk, and several other villages are associated with him, such as Chediston and Chedborogh.

Polstead - Suffolk Churches Website