I too am searching FORTH or FIRTH My decendants came from Newton on Trent LINCOLNSHIRE. The shipping records on their arrival state the name was FIRTH, but records were changed to FORTH. Searching in Lincolshire has been difficult in establishing what was the correct name. I have all their detals but no certifiactes to correct state which family name it is. Do you have anything in that area which might help me. regards.