Id say you hit the nail on the head there regarding the decline of the "terrier on the street" -years ago were poorer times and people couldnt afford to keep dirt-so they probably gave them swimming lessons rather than finding some ape to sell them to.Mind you, we took a lend of a 6 or seven year old pet prick eared ,bent legged old type russell there last season that had never been worked,bred out of a pure cur of a bitch and possibly by any dog in the whole village-by f**k he surprised us all-a right game,hard little dog-its hard to work out .