Hmmm What I think I can work out from this is that Richard Harwood married Ann Allen in Warwickshire and then had a couple of babies there before moving back to Hewelsfield and having at least two more. Makes sense why I can't find a marriage for Richard and Ann in Hewelsfield or the surrounding areas. But obviously the family is originally from the Hewelsfield area and I guess being watermen, they were - as you said - up and down the river quite a bit :)