Hi Beth, Grindley was a wonderful and prolific producer of china. They made alot of flow blue as well as other patterns of dinnerware. Your mark dates between 1880-1914. Usually the pattern name is right above the area where the boat is located, curved above it. Try asking for help from Replacements Ltd. in Greensboro, N.C. They may need a photo but they have a monster of an inventory and will likely be able to at least give you a name. Their site is easy to use and it is possible you may be able to surf it and find the pattern yourself. Good luck!