Interesting connection. There have been Grindley potteries in that time period in England also. I haven't been able to trace a specific connection. One thing I forgot to mention - it doesn't say England? or Made in England? If it doesn't state country of origin, likely made before 1891, when the USA passed some Tariff Act where items made for export to the US had to have the country of origin. About 1921 it became "Made in England". And yes, there are always exceptions to dates, but it's a good indicator of age.
All of my web searches come back to the Keeling & Co., mostly because of the Late Mayers line.
Can you post a pic of the backstamp? KB