There are some patterns that caught on with the public, and others that didn't. Your Hamilton pattern is lovely, but it may not have had a longer run in production that some other flow blue patterns did. What you might do is look at some of the other Late Victorian patterns that are on eBay, such as Argyle (Grindley) or Normandy (Johnson Bros), to get an idea of what your pieces might be valued at. Are you looking at values for insurance purposes or are you wanting to sell the items?