My Lancashire - My accounts of the local area

The Delph in the River Ribble by Avenham Park Over the years, I have always been slightly confused when people mention the the necessity of 'divers' when investigating things in the River Ribble by Avenham Park, adjacent to the Old Tram Road bridge.  However, after being momentarily perplexed by it, my train of thought often moved onto something else.  More recently, when researching the history of the Lancaster Canal, I was led to an account of divers (again) fishing something out of the River Ribble in the same location.  This time, I decided to figure out why they would be needed. The answer is that there is a significantly deep 'Delph' in the River Ribble.  Strangely, whilst I thought that word was generally part of everyone's vocabulary, it turn out not to be.  I didn't pop up in online dictionaries when I did a web search.  Relatively locally, I have had conversations with people about 'Eccy Delph' (Eccleston Delph).  It turns out that Delph  comes