River Nene

The River Nene in the fens of eastern England is sometimes pronounced to rhyme with "Dean", sometimes with "den". A tweet from the Dean of Durham Cathedral, Michael Sadgove, prompted me to pen the following limerick:

A Dean who had been to the Nene said "the scene on the Nene is serene"; but a hen from her pen said "it's not Nene, it's Nen, 'cos the Nen's in the Fens, my old bean."