Hello Hal, welcome!
These cards are ones I bought in Ireland when on holidays there about 15 years ago or so. They are all new and have no stamps nor writing on the reverse sides of them.
I do understand that the stamp and the writing do make or break a postcard, especially for a stamp collector such as myself.
However, at the time I boght these, and even now, years later, these have a magical quality to them that I felt some others might enjoy.
I looked at the John Hinde site you linked to but could not find any of these cards listed or shown there.
I do not have a full collection of them myself. I have 17 different cards total now, numbered cc1 to cc49, not inclusive.